//+------------------------------------------------------------------+
//| BB_Diff.mq4 |
//| Copyright � 2006, Akuma99. |
//| http://www.beginnertrader.com |
//+------------------------------------------------------------------+
#property copyright "Copyright � 2006, Akuma99."
#property link "http://www.beginnertrader.com"
#property indicator_separate_window
#property indicator_color1 Red
extern double bbPeriod=20;
extern double bbDev=2.0;
extern string displayText="Bollinger Band Difference:";
double bbw[];
int init() {
SetIndexStyle(0,DRAW_LINE,EMPTY,1,Red);
SetIndexBuffer(0,bbw);
return(0);
}
int start() {
int counted_bars=IndicatorCounted();
double upperBand,lowerBand,bandDifference;
int limit = Bars-counted_bars;
int i;
for (i=limit; i>=0; i--) {
upperBand = iBands(NULL,0,bbPeriod,bbDev,0,PRICE_CLOSE,MODE_UPPER,i);
lowerBand = iBands(NULL,0,bbPeriod,bbDev,0,PRICE_CLOSE,MODE_LOWER,i);
bandDifference = upperBand-lowerBand;
bbw[i] = bandDifference;
}
Comment("\n",displayText," ", bandDifference, " (", bandDifference/Point," Pips)");
return(0);
}