//+------------------------------------------------------------------+ //| Bands.mq4 | //| Copyright © 2005-07, MetaQuotes Software Corp. | //| http://www.metaquotes.net/ | //+------------------------------------------------------------------+ #property copyright "Copyright © 2005-07, MetaQuotes Software Corp." #property link "http://www.metaquotes.net/" #property indicator_chart_window #property indicator_buffers 3 #property indicator_color1 Red #property indicator_color2 DarkGray #property indicator_color3 DimGray //---- indicator parameters extern int BandsPeriod=18; extern int BandsShift=0; extern double BandsDeviations=2.0; extern string note1 = "0=SimpleMA, 1=EMA"; extern string note2 = "2=SmoothMA, 3=LWMA"; extern int MA_Method=1; //---- buffers double MovingBuffer[]; double UpperBuffer[]; double LowerBuffer[]; //+------------------------------------------------------------------+ //| Custom indicator initialization function | //+------------------------------------------------------------------+ int init() { //---- indicators SetIndexStyle(0,DRAW_LINE); SetIndexBuffer(0,MovingBuffer); SetIndexStyle(1,DRAW_LINE); SetIndexBuffer(1,UpperBuffer); SetIndexStyle(2,DRAW_LINE); SetIndexBuffer(2,LowerBuffer); //---- SetIndexDrawBegin(0,BandsPeriod+BandsShift); SetIndexDrawBegin(1,BandsPeriod+BandsShift); SetIndexDrawBegin(2,BandsPeriod+BandsShift); //---- return(0); } //+------------------------------------------------------------------+ //| Bollinger Bands | //+------------------------------------------------------------------+ int start() { int i,k,counted_bars=IndicatorCounted(); double deviation; double sum,oldval,newres; //---- if(Bars<=BandsPeriod) return(0); //---- initial zero if(counted_bars<1) for(i=1;i<=BandsPeriod;i++) { MovingBuffer[Bars-i]=EMPTY_VALUE; UpperBuffer[Bars-i]=EMPTY_VALUE; LowerBuffer[Bars-i]=EMPTY_VALUE; } //---- int limit=Bars-counted_bars; if(counted_bars>0) limit++; for(i=0; i<limit; i++) // MovingBuffer[i]=iMA(NULL,0,BandsPeriod,BandsShift,MODE_SMA,PRICE_CLOSE,i); MovingBuffer[i]=iMA(NULL,0,BandsPeriod,BandsShift,MA_Method,PRICE_CLOSE,i); //---- i=Bars-BandsPeriod+1; if(counted_bars>BandsPeriod-1) i=Bars-counted_bars-1; while(i>=0) { sum=0.0; k=i+BandsPeriod-1; oldval=MovingBuffer[i]; while(k>=i) { newres=Close[k]-oldval; sum+=newres*newres; k--; } deviation=BandsDeviations*MathSqrt(sum/BandsPeriod); UpperBuffer[i]=oldval+deviation; LowerBuffer[i]=oldval-deviation; i--; } //---- return(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:
Moving average indicator
Custom Indicators Used:
Order Management characteristics:
Other Features: