//+------------------------------------------------------------------+ //| Bands.mq4 | //| Copyright 2005, MetaQuotes Software Corp. | //| http://www.metaquotes.net/ | //+------------------------------------------------------------------+ #property copyright "Copyright 2005, MetaQuotes Software Corp." #property link "http://www.metaquotes.net/" #property indicator_chart_window #property indicator_buffers 3 #property indicator_color1 LightSeaGreen #property indicator_color2 LightSeaGreen #property indicator_color3 LightSeaGreen //---- indicator parameters extern int BandsPeriod=20; extern int BandsShift=0; extern double BandsDeviations=2.0; //---- 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); } //+------------------------------------------------------------------------+ //| LSMA - Least Squares Moving Average function calculation | //| LSMA_In_Color Indicator plots the end of the linear regression line | //+------------------------------------------------------------------------+ double LSMA(int Rperiod, int shift) { int i; double sum; int length; double lengthvar; double tmp; double wt; length = Rperiod; sum = 0; for(i = length; i >= 1 ; i--) { lengthvar = length + 1; lengthvar /= 3; tmp = 0; tmp = ( i - lengthvar)*Close[length-i+shift]; sum+=tmp; } wt = sum*6/(length*(length+1)); return(wt); } //+------------------------------------------------------------------+ //| 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; iBandsPeriod-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); } //+------------------------------------------------------------------+