//+------------------------------------------------------------------+
//| HAMa Step Histo.mq4 |
//| Heiken Ashi Step Ma Histogram |
//+------------------------------------------------------------------+
//| mod by Raff |
//+------------------------------------------------------------------+
#property copyright "Copyright � 2006, Forex-TSD.com "
#property link "http://www.forex-tsd.com/"
#property indicator_separate_window
#property indicator_buffers 2
#property indicator_color1 Red
#property indicator_color2 Blue
#property indicator_width1 2
#property indicator_width2 2
#property indicator_minimum 0
//---- parameters
extern int StepMode = 1;
extern int MaMetod = 1;
extern int MaPeriod = 20;
extern int Step = 0;
extern int CountBars = 1500;
//---- buffers
double ExtMapBuffer1[];
double ExtMapBuffer2[];
double ExtMapBuffer3[];
double ExtMapBuffer4[];
//----
int ExtCountedBars=0;
//+------------------------------------------------------------------+
//| Custom indicator initialization function |
//|------------------------------------------------------------------|
int init()
{
//---- Indicators
IndicatorBuffers(4);
SetIndexStyle(0,DRAW_HISTOGRAM);
SetIndexBuffer(0, ExtMapBuffer1);
SetIndexStyle(1,DRAW_HISTOGRAM);
SetIndexBuffer(1, ExtMapBuffer2);
//---- indicator buffers mapping
SetIndexBuffer(0,ExtMapBuffer1);
SetIndexBuffer(1,ExtMapBuffer2);
SetIndexBuffer(2,ExtMapBuffer3);
SetIndexBuffer(3,ExtMapBuffer4);
string short_name="HAMa Step Histo"+" | "+StepMode+", "+MaMetod+", "+MaPeriod+", "+Step+" | ";
IndicatorShortName(short_name);
//---- initialization done
return(0);
}
//+------------------------------------------------------------------+
//| Custom indicator iteration function |
//+------------------------------------------------------------------+
int start()
{
if (CountBars>Bars-1) CountBars=Bars-1;
double maOpen, maClose, maLow, maHigh;
double haOpen, haHigh, haLow, haClose;
double val1, val2;
if(Bars<=10) return(0);
ExtCountedBars=IndicatorCounted();
//---- check for possible errors
if (ExtCountedBars<0) return(-1);
//---- last counted bar will be recounted
if (ExtCountedBars>0) ExtCountedBars--;
int pos=CountBars;//-ExtCountedBars-1;
while(pos>=0)
{
maOpen=iMA(NULL,0,MaPeriod,0,MaMetod,PRICE_OPEN,pos);
maClose=iMA(NULL,0,MaPeriod,0,MaMetod,PRICE_CLOSE,pos);
maLow=iMA(NULL,0,MaPeriod,0,MaMetod,MODE_LOW,pos);
maHigh=iMA(NULL,0,MaPeriod,0,MaMetod,MODE_HIGH,pos);
haOpen=(ExtMapBuffer3[pos+1]+ExtMapBuffer4[pos+1])/2;
haClose=(maOpen+maHigh+maLow+maClose)/4;
ExtMapBuffer3[pos]=haOpen;
ExtMapBuffer4[pos]=haClose;
val1=haOpen;
val2=haClose;
if (StepMode>0)
{
if (Step>0) if( MathAbs(ExtMapBuffer3[pos]-ExtMapBuffer3[pos+1]) < Step*Point ) ExtMapBuffer3[pos]=ExtMapBuffer3[pos+1];
if (Step>0) if( MathAbs(ExtMapBuffer4[pos]-ExtMapBuffer4[pos+1]) < Step*Point ) ExtMapBuffer4[pos]=ExtMapBuffer4[pos+1];
val1=ExtMapBuffer3[pos];
val2=ExtMapBuffer4[pos];
}
if (pos>CountBars-50)
{
ExtMapBuffer1[pos]=0;
ExtMapBuffer2[pos]=0;
}
else if (pos<=CountBars-50)
{
ExtMapBuffer1[pos]=val1-val2;
ExtMapBuffer2[pos]=val2-val1;
}
pos--;
}
//----
return(0);
}
//+------------------------------------------------------------------+