//+------------------------------------------------------------------+ //| ATR exponential.mq4 | //| Copyright © 2011 Matus German | //| http://www.MTexperts.net/ | //+------------------------------------------------------------------+ #property copyright "Copyright © 2011, Matus German" #property link "http://www.MTexperts.net/" #property indicator_separate_window #property indicator_buffers 1 #property indicator_color1 DodgerBlue //---- input parameters extern int AtrPeriod=14; //---- buffers double AtrBuffer[]; double TempBuffer[]; int counted_bars=0; //+------------------------------------------------------------------+ //| Custom indicator initialization function | //+------------------------------------------------------------------+ int init() { string short_name; //---- 1 additional buffer used for counting. IndicatorBuffers(2); //---- indicator line SetIndexStyle(0,DRAW_LINE); SetIndexBuffer(0,AtrBuffer); SetIndexBuffer(1,TempBuffer); //---- name for DataWindow and indicator subwindow label short_name="ATR exponential("+AtrPeriod+")"; IndicatorShortName(short_name); SetIndexLabel(0,short_name); //---- SetIndexDrawBegin(0,AtrPeriod); //---- return(0); } //+------------------------------------------------------------------+ //| Average True Range | //+------------------------------------------------------------------+ int start() { int i,counted_bars=IndicatorCounted(); //---- if(Bars<=AtrPeriod) return(0); //---- initial zero if(counted_bars<1) for(i=1;i<=AtrPeriod;i++) AtrBuffer[Bars-i]=0.0; //---- double pr=2.0/(AtrPeriod+1); i=Bars-2; if(counted_bars>2) i=Bars-counted_bars-1; //---- main calculation loop while(i>=0) { double high=High[i]; double low =Low[i]; if(i==Bars-1) TempBuffer[i]=high-low; else { double prevclose=Close[i+1]; TempBuffer[i]=MathMax(high,prevclose)-MathMin(low,prevclose); } //if(pos==Bars-2) ExtMapBuffer[pos+1]=Close[pos+1]; AtrBuffer[i]=TempBuffer[i]*pr+AtrBuffer[i+1]*(1-pr); i--; } return(0); }