List of MQL4 Functions - MQL4 Reference

MQL4 Reference List of MQL4 Functions

List of MQL4 Functions

All MQL4 functions in alphabetical order.

Function

Action

Section

AccountBalance

Returns balance value of the current account

Account Information

AccountCompany

Returns the brokerage company name where the current account was registered

Account Information

AccountCredit

Returns credit value of the current account

Account Information

AccountCurrency

Returns currency name of the current account

Account Information

AccountEquity

Returns equity value of the current account

Account Information

AccountFreeMargin

Returns free margin value of the current account

Account Information

AccountFreeMarginCheck

Returns free margin that remains after the specified position has been opened at the current price on the current account

Account Information

AccountFreeMarginMode

Calculation mode of free margin allowed to open orders on the current account

Account Information

AccountInfoDouble

Returns a value of double type of the corresponding account property

Account Information

AccountInfoInteger

Returns a value of integer type (bool, int or long) of the corresponding account property

Account Information

AccountInfoString

Returns a value string type corresponding account property

Account Information

AccountLeverage

Returns leverage of the current account

Account Information

AccountMargin

Returns margin value of the current account

Account Information

AccountName

Returns the current account name

Account Information

AccountNumber

Returns the current account number

Account Information

AccountProfit

Returns profit value of the current account

Account Information

AccountServer

Returns the connected server name

Account Information

AccountStopoutLevel

Returns the value of the Stop Out level

Account Information

AccountStopoutMode

Returns the calculation mode for the Stop Out level

Account Information

acos

Returns the arc cosine of x in radians

Math Functions

Alert

Displays a message in a separate window

Common Functions

ArrayBsearch

Returns index of the first found element in the first array dimension

Array Functions

ArrayCompare

Returns the result of comparing two arrays of simple types or custom structures without complex objects

Array Functions

ArrayCopy

Copies one array into another

Array Functions

ArrayCopyRates

Copies rates to the two-dimensional array from chart RateInfo array returns copied bars amount

Array Functions

ArrayCopySeries

Copies a series array to another one and returns the count of the copied elements

Array Functions

ArrayDimension

Returns the multidimensional array rank

Array Functions

ArrayFill

Fills an array with the specified value

Array Functions

ArrayFree

Frees up buffer of any dynamic array and sets the size of the zero dimension in 0.

Array Functions

ArrayGetAsSeries

Checks direction of array indexing

Array Functions

ArrayInitialize

Sets all elements of a numeric array into a single value

Array Functions

ArrayIsDynamic

Checks whether an array is dynamic

Array Functions

ArrayIsSeries

Checks whether an array is a timeseries

Array Functions

ArrayMaximum

Search for an element with the maximal value

Array Functions

ArrayMinimum

Search for an element with the minimal value

Array Functions

ArrayRange

Returns the number of elements in the specified dimension of the array

Array Functions

ArrayResize

Sets the new size in the first dimension of the array

Array Functions

ArraySetAsSeries

Sets the direction of array indexing

Array Functions

ArraySize

Returns the number of elements in the array

Array Functions

ArraySort

Sorting of numeric arrays by the first dimension

Array Functions

asin

Returns the arc sine of x in radians

Math Functions

atan

Returns the arc tangent of x in radians

Math Functions

Bars

Returns the number of bars count in the history for a specified symbol and period

Timeseries and Indicators Access

ceil

Returns integer numeric value closest from above

Math Functions

CharArrayToString

Converting symbol code (ansi) into one-symbol array

Conversion Functions

ChartApplyTemplate

Applies a specific template from a specified file to the chart

Chart Operations

ChartClose

Closes the specified chart

Chart Operations

ChartFirst

Returns the ID of the first chart of the client terminal

Chart Operations

ChartGetDouble

Returns the double value property of the specified chart

Chart Operations

ChartGetInteger

Returns the integer value property of the specified chart

Chart Operations

ChartGetString

Returns the string value property of the specified chart

Chart Operations

ChartID

Returns the ID of the current chart

Chart Operations

ChartIndicatorDelete

Removes an indicator with a specified name from the specified chart window

Chart Operations

ChartIndicatorName

Returns the short name of the indicator by the number in the indicators list on the specified chart window

Chart Operations

ChartIndicatorsTotal

Returns the number of all indicators applied to the specified chart window.

Chart Operations

ChartNavigate

Performs shift of the specified chart by the specified number of bars relative to the specified position in the chart

Chart Operations

ChartNext

Returns the chart ID of the chart next to the specified one

Chart Operations

ChartOpen

Opens a new chart with the specified symbol and period

Chart Operations

CharToStr

Conversion of the symbol code into a one-character string

Conversion Functions

CharToString

Converting a symbol code into a one-character string

Conversion Functions

ChartPeriod

Returns the period value of the specified chart

Chart Operations

ChartPriceOnDropped

Returns the price coordinate of the chart point, the Expert Advisor or script has been dropped to

Chart Operations

ChartRedraw

Calls a forced redrawing of a specified chart

Chart Operations

ChartSaveTemplate

Saves current chart settings in a template with a specified name

Chart Operations

ChartScreenShot

Provides a screenshot of the chart of its current state in a gif format

Chart Operations

ChartSetDouble

Sets the double value for a corresponding property of the specified chart

Chart Operations

ChartSetInteger

Sets the integer value (datetime, int, color, bool or char) for a corresponding property of the specified chart

Chart Operations

ChartSetString

Sets the string value for a corresponding property of the specified chart

Chart Operations

ChartSetSymbolPeriod

Changes the symbol value and a period of the specified chart

Chart Operations

ChartSymbol

Returns the symbol name of the specified chart

Chart Operations

ChartTimeOnDropped

Returns the time coordinate of the chart point, the Expert Advisor or script has been dropped to

Chart Operations

ChartTimePriceToXY

Converts the coordinates of a chart from the time/price representation to the X and Y coordinates

Chart Operations

ChartWindowFind

Returns the number of a subwindow where an indicator is drawn

Chart Operations

ChartWindowOnDropped

Returns the number (index) of the chart subwindow, the Expert Advisor or script has been dropped to

Chart Operations

ChartXOnDropped

Returns the X coordinate of the chart point, the Expert Advisor or script has been dropped to

Chart Operations

ChartXYToTimePrice

Converts the X and Y coordinates on a chart to the time and price values

Chart Operations

ChartYOnDropped

Returns the Y coordinate of the chart point, the Expert Advisor or script has been dropped to

Chart Operations

CheckPointer

Returns the type of the object pointer

Common Functions

ColorToARGB

Converting color type to uint type to receive ARGB representation of the color.

Conversion Functions

ColorToString

Converting color value into string as "R,G,B"

Conversion Functions

Comment

Outputs a comment in the left top corner of the chart

Common Functions

CopyClose

Gets history data on bar closing price for a specified symbol and period into an array

Timeseries and Indicators Access

CopyHigh

Gets history data on maximal bar price for a specified symbol and period into an array

Timeseries and Indicators Access

CopyLow

Gets history data on minimal bar price for a specified symbol and period into an array

Timeseries and Indicators Access

CopyOpen

Gets history data on bar opening price for a specified symbol and period into an array

Timeseries and Indicators Access

CopyRates

Gets history data of the Rates structure for a specified symbol and period into an array

Timeseries and Indicators Access

CopyTickVolume

Gets history data on tick volumes for a specified symbol and period into an array

Timeseries and Indicators Access

CopyTime

Gets history data on bar opening time for a specified symbol and period into an array

Timeseries and Indicators Access

cos

Returns the cosine of a number

Math Functions

CryptDecode

Performs the inverse transformation of the data from array

Common Functions

CryptEncode

Transforms the data from array with the specified method

Common Functions

Day

Returns the current day of the month, i.e., the day of month of the last known server time

Date and Time

DayOfWeek

Returns the current zero-based day of the week of the last known server time

Date and Time

DayOfYear

Returns the current day of the year i.e., the day of year of the last known server time

Date and Time

DebugBreak

Program breakpoint in debugging

Common Functions

Digits

Returns the number of decimal digits determining the accuracy of the price value of the current chart symbol

Checkup

DoubleToStr

Returns text string with the specified numerical value converted into a specified precision format

Conversion Functions

DoubleToString

Converting a numeric value to a text line with a specified accuracy

Conversion Functions

EnumToString

Converting an enumeration value of any type to string

Conversion Functions

EventChartCustom

Generates a custom event for the specified chart

Working with Events

EventKillTimer

Stops the generation of events by the timer in the current chart

Working with Events

EventSetMillisecondTimer

Launches event generator of the high-resolution timer with a period less than 1 second for the current chart

Working with Events

EventSetTimer

Starts the timer event generator with the specified periodicity for the current chart

Working with Events

exp

Returns exponent of a number

Math Functions

ExpertRemove

Stops Expert Advisor and unloads it from the chart

Common Functions

fabs

Returns absolute value (modulus) of the specified numeric value

Math Functions

FileClose

Closes a previously opened file

File Functions

FileCopy

Copies the original file from a local or shared folder to another file

File Functions

FileDelete

Deletes a specified file

File Functions

FileFindClose

Closes search handle

File Functions

FileFindFirst

Starts the search of files in a directory in accordance with the specified filter

File Functions

FileFindNext

Continues the search started by the FileFindFirst() function

File Functions

FileFlush

Writes to a disk all data remaining in the input/output file buffer

File Functions

FileGetInteger

Gets an integer property of a file

File Functions

FileIsEnding

Defines the end of a file in the process of reading

File Functions

FileIsExist

Checks the existence of a file

File Functions

FileIsLineEnding

Defines the end of a line in a text file in the process of reading

File Functions

FileMove

Moves or renames a file

File Functions

FileOpen

Opens a file with a specified name and flag

File Functions

FileOpenHistory

Opens file in the current history directory or in its subfolders

File Functions

FileReadArray

Reads arrays of any type except for string from the file of the BIN type

File Functions

FileReadBool

Reads from the file of the CSV type a string from the current position till a delimiter (or till the end of a text line) and converts the read string to a value of bool type

File Functions

FileReadDatetime

Reads from the file of the CSV type a string of one of the formats: "YYYY.MM.DD HH:MM:SS", "YYYY.MM.DD" or "HH:MM:SS" - and converts it into a datetime value

File Functions

FileReadDouble

Reads a double value from the current position of the file pointer

File Functions

FileReadFloat

Reads a float value from the current position of the file pointer

File Functions

FileReadInteger

Reads int, short or char value from the current position of the file pointer

File Functions

FileReadLong

Reads a long type value from the current position of the file pointer

File Functions

FileReadNumber

Reads from the file of the CSV type a string from the current position till a delimiter (or til the end of a text line) and converts the read string into double value

File Functions

FileReadString

Reads a string from the current position of a file pointer from a file

File Functions

FileReadStruct

Reads the contents from a binary file  into a structure passed as a parameter, from the current position of the file pointer

File Functions

FileSeek

Moves the position of the file pointer by a specified number of bytes relative to the specified position

File Functions

FileSize

Returns the size of a corresponding open file

File Functions

FileTell

Returns the current position of the file pointer of a corresponding open file

File Functions

FileWrite

Writes data to a file of CSV or TXT type

File Functions

FileWriteArray

Writes arrays of any type except for string into a file of BIN type

File Functions

FileWriteDouble

Writes value of the double type from the current position of a file pointer into a binary file

File Functions

FileWriteFloat

Writes value of the float type from the current position of a file pointer into a binary file

File Functions

FileWriteInteger

Writes value of the int type from the current position of a file pointer into a binary file

File Functions

FileWriteLong

Writes value of the long type from the current position of a file pointer into a binary file

File Functions

FileWriteString

Writes the value of a string parameter into a BIN or TXT file starting from the current position of the file pointer

File Functions

FileWriteStruct

Writes the contents of a structure passed as a parameter into a binary file, starting from the current position of the file pointer

File Functions

floor

Returns integer numeric value closest from below

Math Functions

fmax

Returns the maximal value of the two numeric values

Math Functions

fmin

Returns the minimal value of the two numeric values

Math Functions

fmod

Returns the real remainder after the division of two numbers

Math Functions

FolderClean

Deletes all files in the specified folder

File Functions

FolderCreate

Creates a folder in the Files directory

File Functions

FolderDelete

Removes a selected directory. If the folder is not empty, then it can't be removed

File Functions

GetLastError

Returns the last error

Checkup

GetPointer

Returns the object pointer

Common Functions

GetTickCount

Returns the number of milliseconds that have elapsed since the system was started

Common Functions

GlobalVariableCheck

Checks the existence of a global variable with the specified name

Global Variables of the Terminal

GlobalVariableDel

Deletes a global variable

Global Variables of the Terminal

GlobalVariableGet

Returns the value of a global variable

Global Variables of the Terminal

GlobalVariableName

Returns the name of a global variable by it's ordinal number in the list of global variables

Global Variables of the Terminal

GlobalVariablesDeleteAll

Deletes global variables with the specified prefix in their names

Global Variables of the Terminal

GlobalVariableSet

Sets the new value to a global variable

Global Variables of the Terminal

GlobalVariableSetOnCondition

Sets the new value of the existing global variable by condition

Global Variables of the Terminal

GlobalVariablesFlush

Forcibly saves contents of all global variables to a disk

Global Variables of the Terminal

GlobalVariablesTotal

Returns the total number of global variables

Global Variables of the Terminal

GlobalVariableTemp

Sets the new value to a global variable, that exists only in the current session of the terminal

Global Variables of the Terminal

GlobalVariableTime

Returns time of the last accessing the global variable

Global Variables of the Terminal

HideTestIndicators

The function sets a flag hiding indicators called by the Expert Advisor

Custom Indicators

Hour

Returns the hour of the last known server time by the moment of the program start

Date and Time

iAC

Accelerator Oscillator

Technical Indicators

iAD

Accumulation/Distribution

Technical Indicators

iADX

Average Directional Index

Technical Indicators

iAlligator

Alligator

Technical Indicators

iAO

Awesome Oscillator

Technical Indicators

iATR

Average True Range

Technical Indicators

iBands

Bollinger Bands®

Technical Indicators

iBandsOnArray

Calculation of Bollinger Bands® indicator on data, stored in a numeric array

Technical Indicators

iBars

Returns the number of bars on the specified chart

Timeseries and Indicators Access

iBarShift

Returns the index of the bar which covers the specified time

Timeseries and Indicators Access

iBearsPower

Bears Power

Technical Indicators

iBullsPower

Bulls Power

Technical Indicators

iBWMFI

Market Facilitation Index by Bill Williams

Technical Indicators

iCCI

Commodity Channel Index

Technical Indicators

iCCIOnArray

Calculation of Commodity Channel Index indicator on data, stored in a numeric array

Technical Indicators

iClose

Returns Close price value for the bar of specified symbol with timeframe and shift

Timeseries and Indicators Access

iCustom

Custom indicator

Technical Indicators

iDeMarker

DeMarker

Technical Indicators

iEnvelopes

Envelopes

Technical Indicators

iEnvelopesOnArray

Calculation of Envelopes indicator on data, stored in a numeric array

Technical Indicators

iForce

Force Index

Technical Indicators

iFractals

Fractals

Technical Indicators

iGator

Gator Oscillator

Technical Indicators

iHigh

Returns High price value for the bar of specified symbol with timeframe and shift

Timeseries and Indicators Access

iHighest

Returns the shift of the maximum value over a specific number of bars

Timeseries and Indicators Access

iIchimoku

Ichimoku Kinko Hyo

Technical Indicators

iLow

Returns Low price value for the bar of indicated symbol with timeframe and shift

Timeseries and Indicators Access

iLowest

Returns the shift of the lowest value over a specific number of bars

Timeseries and Indicators Access

iMA

Moving Average

Technical Indicators

iMACD

Moving Averages Convergence-Divergence

Technical Indicators

iMAOnArray

Calculation of Moving Average indicator on data, stored in a numeric array

Technical Indicators

iMFI

Money Flow Index

Technical Indicators

iMomentum

Momentum

Technical Indicators

iMomentumOnArray

Calculation of Momentum indicator on data, stored in a numeric array

Technical Indicators

IndicatorBuffers

Allocates memory for buffers used for custom indicator calculations

Custom Indicators

IndicatorCounted

Returns the amount of bars not changed after the indicator had been launched last

Custom Indicators

IndicatorDigits

Sets precision format to visualize indicator values

Custom Indicators

IndicatorSetDouble

Sets the value of an indicator property of the double type

Custom Indicators

IndicatorSetInteger

Sets the value of an indicator property of the int type

Custom Indicators

IndicatorSetString

Sets the value of an indicator property of the string type

Custom Indicators

IndicatorShortName

Sets the "short" name of a custom indicator to be shown in the DataWindow and in the chart subwindow

Custom Indicators

IntegerToString

Converting int into a string of preset length

Conversion Functions

iOBV

On Balance Volume

Technical Indicators

iOpen

Returns Open price value for the bar of specified symbol with timeframe and shift

Timeseries and Indicators Access

iOsMA

Moving Average of Oscillator (MACD histogram)

Technical Indicators

iRSI

Relative Strength Index

Technical Indicators

iRSIOnArray

Calculation of Momentum indicator on data, stored in a numeric array

Technical Indicators

iRVI

Relative Vigor Index

Technical Indicators

iSAR

Parabolic Stop And Reverse System

Technical Indicators

IsConnected

Checks connection between client terminal and server

Checkup

IsDemo

Checks if the Expert Advisor runs on a demo account

Checkup

IsDllsAllowed

Checks if the DLL function call is allowed for the Expert Advisor

Checkup

IsExpertEnabled

Checks if Expert Advisors are enabled for running

Checkup

IsLibrariesAllowed

Checks if the Expert Advisor can call library function

Checkup

IsOptimization

Checks if Expert Advisor runs in the Strategy Tester optimization mode

Checkup

IsStopped

Returns true, if an mql4 program has been commanded to stop its operation

Checkup

iStdDev

Standard Deviation

Technical Indicators

iStdDevOnArray

Calculation of Standard Deviation indicator on data, stored in a numeric array

Technical Indicators

IsTesting

Checks if the Expert Advisor runs in the testing mode

Checkup

iStochastic

Stochastic Oscillator

Technical Indicators

IsTradeAllowed

Checks if the Expert Advisor is allowed to trade and trading context is not busy

Checkup

IsTradeContextBusy

Returns the information about trade context

Checkup

IsVisualMode

Checks if the Expert Advisor is tested in visual mode

Checkup

iTime

Returns time value for the bar of specified symbol with timeframe and shift

Timeseries and Indicators Access

iVolume

Returns Tick Volume value for the bar of specified symbol with timeframe and shift

Timeseries and Indicators Access

iWPR

Williams' Percent Range

Technical Indicators

log

Returns natural logarithm

Math Functions

log10

Returns the logarithm of a number by base 10

Math Functions

MarketInfo

Returns various data about securities listed in the "Market Watch" window

Market Info

MathAbs

Returns absolute value (modulus) of the specified numeric value

Math Functions

MathArccos

Returns the arc cosine of x in radians

Math Functions

MathArcsin

Returns the arc sine of x in radians

Math Functions

MathArctan

Returns the arc tangent of x in radians

Math Functions

MathCeil

Returns integer numeric value closest from above

Math Functions

MathCos

Returns the cosine of a number

Math Functions

MathExp

Returns exponent of a number

Math Functions

MathFloor

Returns integer numeric value closest from below

Math Functions

MathIsValidNumber

Checks the correctness of a real number

Math Functions

MathLog

Returns natural logarithm

Math Functions

MathLog10

Returns the logarithm of a number by base 10

Math Functions

MathMax

Returns the maximal value of the two numeric values

Math Functions

MathMin

Returns the minimal value of the two numeric values

Math Functions

MathMod

Returns the real remainder after the division of two numbers

Math Functions

MathPow

Raises the base to the specified power

Math Functions

MathRand

Returns a pseudorandom value within the range of 0 to 32767

Math Functions

MathRound

Rounds of a value to the nearest integer

Math Functions

MathSin

Returns the sine of a number

Math Functions

MathSqrt

Returns a square root

Math Functions

MathSrand

Sets the starting point for generating a series of pseudorandom integers

Math Functions

MathTan

Returns the tangent of a number

Math Functions

MessageBox

Creates, displays a message box and manages it

Common Functions

Minute

Returns the current minute of the last known server time by the moment of the program start

Date and Time

Month

Returns the current month as number, i.e., the number of month of the last known server time

Date and Time

MQLInfoInteger

Returns an integer value of a corresponding property of a running mql4 program

Checkup

MQLInfoString

Returns a string value of a corresponding property of a running mql4 program

Checkup

MQLSetInteger

Sets the value of the MQL_CODEPAGE property in an MQL4 program environment

Checkup

NormalizeDouble

Rounding of a floating point number to a specified accuracy

Conversion Functions

ObjectCreate

Creates an object of the specified type in a specified chart

Object Functions

ObjectDelete

Removes the object having the specified name

Object Functions

ObjectDescription

Returns the object description

Object Functions

ObjectFind

Searches for an object having the specified name

Object Functions

ObjectGet

Returns the value of the specified object property

Object Functions

ObjectGetDouble

Returns the double value of the corresponding object property

Object Functions

ObjectGetFiboDescription

Returns the level description of a Fibonacci object

Object Functions

ObjectGetInteger

Returns the integer value of the corresponding object property

Object Functions

ObjectGetShiftByValue

Calculates and returns bar index for the given price

Object Functions

ObjectGetString

Returns the string value of the corresponding object property

Object Functions

ObjectGetTimeByValue

Returns the time value for the specified object price value

Object Functions

ObjectGetValueByShift

Calculates and returns the price value for the specified bar

Object Functions

ObjectGetValueByTime

Returns the price value of an object for the specified time

Object Functions

ObjectMove

Changes the coordinates of the specified object anchor point

Object Functions

ObjectName

Returns the name of an object by its index in the objects list

Object Functions

ObjectsDeleteAll

Removes all objects of the specified type from the specified chart subwindow

Object Functions

ObjectSet

Changes the value of the specified object property

Object Functions

ObjectSetDouble

Sets the value of the corresponding object property

Object Functions

ObjectSetFiboDescription

Sets a new description to a level of a Fibonacci object

Object Functions

ObjectSetInteger

Sets the value of the corresponding object property

Object Functions

ObjectSetString

Sets the value of the corresponding object property

Object Functions

ObjectSetText

Changes the object description

Object Functions

ObjectsTotal

Returns the number of objects of the specified type

Object Functions

ObjectType

Returns the object type

Object Functions

OrderClose

Closes opened order

Trade Functions

OrderCloseBy

Closes an opened order by another opposite opened order

Trade Functions

OrderClosePrice

Returns close price of the currently selected order

Trade Functions

OrderCloseTime

Returns close time of the currently selected order

Trade Functions

OrderComment

Returns comment of the currently selected order

Trade Functions

OrderCommission

Returns calculated commission of the currently selected order

Trade Functions

OrderDelete

Deletes previously opened pending order

Trade Functions

OrderExpiration

Returns expiration date of the selected pending order

Trade Functions

OrderLots

Returns amount of lots of the selected order

Trade Functions

OrderMagicNumber

Returns an identifying (magic) number of the currently selected order

Trade Functions

OrderModify

Modification of characteristics of the previously opened or pending orders

Trade Functions

OrderOpenPrice

Returns open price of the currently selected order

Trade Functions

OrderOpenTime

Returns open time of the currently selected order

Trade Functions

OrderPrint

Prints information about the selected order in the log

Trade Functions

OrderProfit

Returns profit of the currently selected order

Trade Functions

OrderSelect

The function selects an order for further processing

Trade Functions

OrderSend

The main function used to open an order or place a pending order

Trade Functions

OrdersHistoryTotal

Returns the number of closed orders in the account history loaded into the terminal

Trade Functions

OrderStopLoss

Returns stop loss value of the currently selected order

Trade Functions

OrdersTotal

Returns the number of market and pending orders

Trade Functions

OrderSwap

Returns swap value of the currently selected order

Trade Functions

OrderSymbol

Returns symbol name of the currently selected order

Trade Functions

OrderTakeProfit

Returns take profit value of the currently selected order

Trade Functions

OrderTicket

Returns ticket number of the currently selected order

Trade Functions

OrderType

Returns order operation type of the currently selected order

Trade Functions

Period

Returns the current chart timeframe

Checkup

Period

Returns timeframe of the current chart

Chart Operations

PeriodSeconds

Returns the number of seconds in the period

Common Functions

PlaySound

Plays a sound file

Common Functions

Point

Returns the point size of the current symbol in the quote currency

Checkup

pow

Raises the base to the specified power

Math Functions

Print

Displays a message in the log

Common Functions

PrintFormat

Formats and prints the sets of symbols and values in a log file in accordance with a preset format

Common Functions

rand

Returns a pseudorandom value within the range of 0 to 32767

Math Functions

RefreshRates

Refreshing of data in pre-defined variables and series arrays

Timeseries and Indicators Access

ResetLastError

Sets the value of a predetermined variable _LastError to zero

Common Functions

ResourceCreate

Creates an image resource based on a data set

Common Functions

ResourceFree

Deletes dynamically created resource (freeing the memory allocated for it)

Common Functions

ResourceReadImage

Reads data from the graphical resource created by ResourceCreate() function or saved in EX4 file during compilation

Common Functions

ResourceSave

Saves a resource into the specified file

Common Functions

round

Rounds of a value to the nearest integer

Math Functions

Seconds

Returns the amount of seconds elapsed from the beginning of the current minute of the last known server time by the moment of the program start

Date and Time

SendFTP

Sends a file at the address specified in the settings window of the "FTP" tab

Common Functions

SendMail

Sends an email at the address specified in the settings window of the "Email" tab

Common Functions

SendNotification

Sends push notifications to mobile terminals, whose MetaQuotes ID are specified in the "Notifications" tab

Common Functions

SeriesInfoInteger

Returns information about the state of historical data

Timeseries and Indicators Access

SetIndexArrow

Sets an arrow symbol for indicators line of the DRAW_ARROW type

Custom Indicators

SetIndexBuffer

Binds the specified indicator buffer with one-dimensional dynamic array of the double type

Custom Indicators

SetIndexDrawBegin

Sets the bar number from which the drawing of the given indicator line must start

Custom Indicators

SetIndexEmptyValue

Sets drawing line empty value

Custom Indicators

SetIndexLabel

Sets drawing line description for showing in the DataWindow and in the tooltip

Custom Indicators

SetIndexShift

Sets offset for the drawing line

Custom Indicators

SetIndexStyle

Sets the new type, style, width and color for a given indicator line

Custom Indicators

SetLevelStyle

Sets a new style, width and color of horizontal levels of indicator to be output in a separate window

Custom Indicators

SetLevelValue

Sets a value for a given horizontal level of the indicator to be output in a separate window

Custom Indicators

ShortArrayToString

Copying array part into a string

Conversion Functions

ShortToString

Converting symbol code (unicode) into one-symbol string

Conversion Functions

SignalBaseGetDouble

Returns the value of double type property for selected signal

Trade Signals

SignalBaseGetInteger

Returns the value of integer type property for selected signal

Trade Signals

SignalBaseGetString

Returns the value of string type property for selected signal

Trade Signals

SignalBaseSelect

Selects a signal from signals, available in terminal for further working with it

Trade Signals

SignalBaseTotal

Returns the total amount of signals, available in terminal

Trade Signals

SignalInfoGetDouble

Returns the value of double type property of signal copy settings

Trade Signals

SignalInfoGetInteger

Returns the value of integer type property of signal copy settings

Trade Signals

SignalInfoGetString

Returns the value of string type property of signal copy settings

Trade Signals

SignalInfoSetDouble

Sets the value of double type property of signal copy settings

Trade Signals

SignalInfoSetInteger

Sets the value of integer type property of signal copy settings

Trade Signals

SignalSubscribe

Subscribes to the trading signal

Trade Signals

SignalUnsubscribe

Cancels subscription

Trade Signals

sin

Returns the sine of a number

Math Functions

Sleep

Suspends execution of the current Expert Advisor or script within a specified interval

Common Functions

sqrt

Returns a square root

Math Functions

srand

Sets the starting point for generating a series of pseudorandom integers

Math Functions

StringAdd

Adds a string to the end of another string

String Functions

StringBufferLen

Returns the size of buffer allocated for the string

String Functions

StringCompare

Compares two strings and returns 1 if the first string is greater than the second; 0 - if the strings are equal; -1 (minus 1) - if the first string is less than the second one

String Functions

StringConcatenate

Forms a string of parameters passed

String Functions

StringFill

Fills out a specified string by selected symbols

String Functions

StringFind

Search for a substring in a string

String Functions

StringFormat

Converting number into string according to preset format

Conversion Functions

StringGetChar

Returns character (code) from the specified position in the string

String Functions

StringGetCharacter

Returns the value of a number located in the specified string position

String Functions

StringInit

Initializes string by specified symbols and provides the specified string length

String Functions

StringLen

Returns the number of symbols in a string

String Functions

StringReplace

Replaces all the found substrings of a string by a set sequence of symbols

String Functions

StringSetChar

Returns the string copy with changed character in the specified position

String Functions

StringSetCharacter

Returns true is a symbol is successfully inserted to the passed string.

String Functions

StringSplit

Gets substrings by a specified separator from the specified string, returns the number of substrings obtained

String Functions

StringSubstr

Extracts a substring from a text string starting from a specified position

String Functions

StringToCharArray

Symbol-wise copying a string converted from Unicode to ANSI, to a selected place of array of uchar type

Conversion Functions

StringToColor

Converting "R,G,B" string or string with color name into color type value

Conversion Functions

StringToDouble

Converting a string containing a symbol representation of number into number of double type

Conversion Functions

StringToInteger

Converting a string containing a symbol representation of number into number of int type

Conversion Functions

StringToLower

Transforms all symbols of a selected string to lowercase by location

String Functions

StringToShortArray

Symbol-wise copying a string to a selected part of array of ushort type

Conversion Functions

StringToTime

Converting a string containing time or date in "yyyy.mm.dd [hh:mi]" format into datetime type

Conversion Functions

StringToUpper

Transforms all symbols of a selected string into capitals by location

String Functions

StringTrimLeft

Cuts line feed characters, spaces and tabs in the left part of the string

String Functions

StringTrimRight

Cuts line feed characters, spaces and tabs in the right part of the string

String Functions

StrToDouble

Converts string representation of number to double type

Conversion Functions

StrToInteger

Converts string containing the value character representation into a value of the integer type

Conversion Functions

StrToTime

Converts string in the format "yyyy.mm.dd hh:mi" to datetime type

Conversion Functions

StructToTime

Converts a variable of MqlDateTime structure type into a datetime value

Date and Time

Symbol

Returns the name of a symbol of the current chart

Checkup

Symbol

Returns a text string with the name of the current financial instrument

Chart Operations

SymbolInfoDouble

Returns the double value of the symbol for the corresponding property

Market Info

SymbolInfoInteger

Returns a value of an integer type (long, datetime, int or bool) of a specified symbol for the corresponding property

Market Info

SymbolInfoSessionQuote

Allows receiving time of beginning and end of the specified quoting sessions for a specified symbol and day of week.

Market Info

SymbolInfoSessionTrade

Allows receiving time of beginning and end of the specified trading sessions for a specified symbol and day of week.

Market Info

SymbolInfoString

Returns a value of the string type of a specified symbol for the corresponding property

Market Info

SymbolInfoTick

Returns the current prices for the specified symbol in a variable of the MqlTick type

Market Info

SymbolName

Returns the name of a specified symbol

Market Info

SymbolSelect

Selects a symbol in the Market Watch window or removes a symbol from the window

Market Info

SymbolsTotal

Returns the number of available (selected in Market Watch or all) symbols

Market Info

tan

Returns the tangent of a number

Math Functions

TerminalClose

Commands the terminal to complete operation

Common Functions

TerminalCompany

Returns the name of company owning the client terminal

Checkup

TerminalInfoDouble

Returns an double value of a corresponding property of a running mql4 program

Checkup

TerminalInfoInteger

Returns an integer value of a corresponding property of a running mql4 program

Checkup

TerminalInfoString

Returns a string value of a corresponding property of a running mql4 program

Checkup

TerminalName

Returns client terminal name

Checkup

TerminalPath

Returns the directory, from which the client terminal was launched

Checkup

TesterStatistics

It returns the value of a specified statistic calculated based on testing results

Common Functions

TextGetSize

Returns the string's width and height at the current font settings

Object Functions

TextOut

Transfers the text to the custom array (buffer) designed for creation of a graphical resource

Object Functions

TextSetFont

Sets the font for displaying the text using drawing methods (Arial 20 used by default)

Object Functions

TimeCurrent

Returns the last known server time (time of the last quote receipt) in the datetime format

Date and Time

TimeDay

Returns the day of month of the specified date

Date and Time

TimeDaylightSavings

Returns the sign of Daylight Saving Time switch

Date and Time

TimeDayOfWeek

Returns the zero-based day of week of the specified date

Date and Time

TimeDayOfYear

Returns the day of year of the specified date

Date and Time

TimeGMT

Returns GMT in datetime format with the Daylight Saving Time by local time of the computer, where the client terminal is running

Date and Time

TimeGMTOffset

Returns the current difference between GMT time and the local computer time in seconds, taking into account DST switch

Date and Time

TimeHour

Returns the hour of the specified time

Date and Time

TimeLocal

Returns the local computer time in datetime format

Date and Time

TimeMinute

Returns the minute of the specified time

Date and Time

TimeMonth

Returns the month number of the specified time

Date and Time

TimeSeconds

Returns the amount of seconds elapsed from the beginning of the minute of the specified time

Date and Time

TimeToStr

Converts value of datetime type into a string of "yyyy.mm.dd hh:mi" format

Conversion Functions

TimeToString

Converting a value containing time in seconds elapsed since 01.01.1970 into a string of "yyyy.mm.dd hh:mi" format

Conversion Functions

TimeToStruct

Converts a datetime value into a variable of MqlDateTime structure type

Date and Time

TimeYear

Returns year of the specified date

Date and Time

UninitializeReason

Returns the code of the reason for deinitialization

Checkup

WebRequest

Sends HTTP request to the specified server

Common Functions

WindowBarsPerChart

Returns the amount of bars visible on the chart

Chart Operations

WindowExpertName

Returns the name of the executed Expert Advisor, script, custom indicator, or library

Chart Operations

WindowFind

Returns the window index containing this specified indicator

Chart Operations

WindowFirstVisibleBar

Returns index of the first visible bar in the current chart window

Chart Operations

WindowHandle

Returns the system handle of the chart window

Chart Operations

WindowIsVisible

Returns the visibility flag of the chart subwindow

Chart Operations

WindowOnDropped

Returns the window index where Expert Advisor, custom indicator or script was dropped

Chart Operations

WindowPriceMax

Returns the maximal value of the vertical scale of the specified subwindow of the current chart

Chart Operations

WindowPriceMin

Returns the minimal value of the vertical scale of the specified subwindow of the current chart

Chart Operations

WindowPriceOnDropped

Returns the price of the chart point where Expert Advisor or script was dropped

Chart Operations

WindowRedraw

Redraws the current chart forcedly

Chart Operations

WindowScreenShot

Saves current chart screen shot as a GIF, PNG or BMP file depending on specified extension

Chart Operations

WindowsTotal

Returns total number of indicator windows on the chart

Chart Operations

WindowTimeOnDropped

Returns the time of the chart point where Expert Advisor or script was dropped

Chart Operations

WindowXOnDropped

Returns the value at X axis in pixels for the chart window client area point at which the Expert Advisor or script was dropped

Chart Operations

WindowYOnDropped

Returns the value at Y axis in pixels for the chart window client area point at which the Expert Advisor or script was dropped

Chart Operations

Year

Returns the current year, i.e., the year of the last known server time

Date and Time

ZeroMemory

Resets a variable passed to it by reference. The variable can be of any type, except for classes and structures that have constructors.

Common Functions