IndicatorBuffers - MQL4 Documentation

MQL4 Reference Custom indicators IndicatorBuffers

void IndicatorBuffers(

int count)

Allocates memory for buffers used for custom indicator calculations. The amount of buffers cannot exceed 8 or be less than the value given in the indicator_buffers property. If custom indicator requires additional buffers for counting, this function must be used for specifying of the total amount of buffers.

Parameters:

count

Amount of buffers to be allocated. Should be within the range between indicator_buffers and 8 buffers.

Sample:

#property  indicator_separate_window
#property  indicator_buffers 1
#property  indicator_color1  Silver
//---- indicator parameters
extern int FastEMA=12;
extern int SlowEMA=26;
extern int SignalSMA=9;
//---- indicator buffers
double     ind_buffer1[];
double     ind_buffer2[];
double     ind_buffer3[];
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int init()
  {
//---- 2 additional buffers are used for counting.
   IndicatorBuffers(3);
//---- drawing settings
   SetIndexStyle(0,DRAW_HISTOGRAM,STYLE_SOLID,3);
   SetIndexDrawBegin(0,SignalSMA);
   IndicatorDigits(MarketInfo(Symbol(),MODE_DIGITS)+2);
//---- 3 indicator buffers mapping
   SetIndexBuffer(0,ind_buffer1);
   SetIndexBuffer(1,ind_buffer2);
   SetIndexBuffer(2,ind_buffer3);
//---- name for DataWindow and indicator subwindow label
   IndicatorShortName("OsMA("+FastEMA+","+SlowEMA+","+SignalSMA+")");
//---- initialization done
   return(0);
  }

Custom indicators IndicatorCounted