//+------------------------------------------------------------------+ //| Custom Moving Average.mq4 | //| Copyright © 2004, MetaQuotes Software Corp. | //| http://www.metaquotes.net/ | //+------------------------------------------------------------------+ #property copyright "Copyright © 2004, MetaQuotes Software Corp." #property link "http://www.metaquotes.net/" #property indicator_separate_window #property indicator_buffers 1 #property indicator_color1 Red //---- indicator parameters extern int MA_Period=13; extern int MA_Shift=0; extern int MA_Method=0; //---- indicator buffers double ExtMapBuffer[]; //---- int ExtCountedBars=0; //+------------------------------------------------------------------+ //| Custom indicator initialization function | //+------------------------------------------------------------------+ int init() { int draw_begin; string short_name; //---- drawing settings SetIndexStyle(0,DRAW_LINE); SetIndexShift(0,MA_Shift); IndicatorDigits(MarketInfo(Symbol(),MODE_DIGITS)); if(MA_Period<2) MA_Period=13; draw_begin=MA_Period-1; //---- indicator short name switch(MA_Method) { case 1 : short_name="EMA("; draw_begin=0; break; case 2 : short_name="SMMA("; break; case 3 : short_name="LWMA("; break; default : MA_Method=0; short_name="SMA("; } IndicatorShortName(short_name+MA_Period+")"); SetIndexDrawBegin(0,draw_begin); //---- indicator buffers mapping SetIndexBuffer(0,ExtMapBuffer); //---- initialization done return(0); } //+------------------------------------------------------------------+ //| | //+------------------------------------------------------------------+ int start() { if(Bars<=MA_Period) return(0); ExtCountedBars=IndicatorCounted(); //---- check for possible errors if (ExtCountedBars<0) return(-1); //---- last counted bar will be recounted if (ExtCountedBars>0) ExtCountedBars--; //---- switch(MA_Method) { case 0 : sma(); break; case 1 : ema(); break; case 2 : smma(); break; case 3 : lwma(); } //---- done return(0); } //+------------------------------------------------------------------+ //| Simple Moving Average | //+------------------------------------------------------------------+ void sma() { double sum=0; int i,pos=Bars-ExtCountedBars-1; //---- initial accumulation if(pos<MA_Period) pos=MA_Period; for(i=1;i<MA_Period;i++,pos--) sum+=Close[pos]; //---- main calculation loop while(pos>=0) { sum+=Close[pos]; ExtMapBuffer[pos]=sum/MA_Period; sum-=Close[pos+MA_Period-1]; pos--; } //---- zero initial bars if(ExtCountedBars<1) for(i=1;i<MA_Period;i++) ExtMapBuffer[Bars-i]=0; } //+------------------------------------------------------------------+ //| Exponential Moving Average | //+------------------------------------------------------------------+ void ema() { double pr=2.0/(MA_Period+1); int pos=Bars-2; if(ExtCountedBars>2) pos=Bars-ExtCountedBars-1; //---- main calculation loop while(pos>=0) { if(pos==Bars-2) ExtMapBuffer[pos+1]=Close[pos+1]; ExtMapBuffer[pos]=Close[pos]*pr+ExtMapBuffer[pos+1]*(1-pr); pos--; } } //+------------------------------------------------------------------+ //| Smoothed Moving Average | //+------------------------------------------------------------------+ void smma() { double sum=0; int i,k,pos=Bars-ExtCountedBars+1; //---- main calculation loop pos=Bars-MA_Period; if(pos>Bars-ExtCountedBars) pos=Bars-ExtCountedBars; while(pos>=0) { if(pos==Bars-MA_Period) { //---- initial accumulation for(i=0,k=pos;i<MA_Period;i++,k++) { sum+=Close[k]; //---- zero initial bars ExtMapBuffer[k]=0; } } else sum=ExtMapBuffer[pos+1]*(MA_Period-1)+Close[pos]; ExtMapBuffer[pos]=sum/MA_Period; pos--; } } //+------------------------------------------------------------------+ //| Linear Weighted Moving Average | //+------------------------------------------------------------------+ void lwma() { double sum=0.0,lsum=0.0; double price; int i,weight=0,pos=Bars-ExtCountedBars-1; //---- initial accumulation if(pos<MA_Period) pos=MA_Period; for(i=1;i<=MA_Period;i++,pos--) { price=Close[pos]; sum+=price*i; lsum+=price; weight+=i; } //---- main calculation loop pos++; i=pos+MA_Period; while(pos>=0) { ExtMapBuffer[pos]=sum/weight; if(pos==0) break; pos--; i--; price=Close[pos]; sum=sum-lsum+price*MA_Period; lsum-=Close[i]; lsum+=price; } //---- zero initial bars if(ExtCountedBars<1) for(i=1;i<MA_Period;i++) ExtMapBuffer[Bars-i]=0; } //+------------------------------------------------------------------+
Sample
Analysis
Market Information Used:
Series array that contains close prices for each bar
Indicator Curves created:
Implements a curve of type DRAW_LINE
Indicators Used:
Custom Indicators Used:
Order Management characteristics:
Other Features: