MQL4 Reference 
Technical indicators iStdDevOnArray
| double iStdDevOnArray( |
double array[], int total, int ma_period, int ma_shift, int ma_method, int shift) |
Calculation of the Standard Deviation indicator on data stored in a numeric array.
Unlike iStdDev(...), the iStdDevOnArray function does not take data by symbol name,
timeframe, the applied price. The price data must be previously prepared.
The indicator is calculated from left to right. To access to the array elements as to a series array
(i.e., from right to left), one has to use the ArraySetAsSeries function.
Parameters:
| array[] |
- |
Array with data. |
| total |
- |
The number of items to be counted. |
| ma_period |
- |
MA period. |
| ma_shift |
- |
MA shift. |
| ma_method |
- |
MA method. It can be any of Moving Average method enumeration value. |
| shift |
- |
Index of the value taken from the indicator buffer (shift relative to the current bar the given amount of periods ago). |
Sample:
double val=iStdDevOnArray(ExtBuffer,100,10,0,MODE_EMA,0);
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