//+------------------------------------------------------------------+ //| Keltner Channel.mq4 | //| Coded by Gilani | //| 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 Red #property indicator_color2 Blue #property indicator_color3 Red //---- input parameters extern int period = 10; //---- double upper[], middle[], lower[]; //+------------------------------------------------------------------+ //| Custom indicator initialization function | //+------------------------------------------------------------------+ int init() { SetIndexBuffer(0, upper); SetIndexStyle(0, DRAW_LINE); SetIndexShift(0, 0); SetIndexDrawBegin(0, 0); //---- SetIndexBuffer(1, middle); SetIndexStyle(1, DRAW_LINE, STYLE_DASHDOT); SetIndexShift(1, 0); SetIndexDrawBegin(1, 0); //---- SetIndexBuffer(2, lower); SetIndexStyle(2, DRAW_LINE); SetIndexShift(2, 0); SetIndexDrawBegin(2, 0); //---- name for DataWindow label SetIndexLabel(0, "KChanUp(" + IntegerToString(period) + ")"); SetIndexLabel(1, "KChanMid(" + IntegerToString(period) + ")"); SetIndexLabel(2, "KChanLow(" + IntegerToString(period) + ")"); //---- return(0); } //+------------------------------------------------------------------+ //| Custor indicator deinitialization function | //+------------------------------------------------------------------+ int deinit() { //---- return(0); } //+------------------------------------------------------------------+ //| Custom indicator iteration function | //+------------------------------------------------------------------+ int start() { int limit; double avg; int counted_bars = IndicatorCounted(); if(counted_bars < 0) return(-1); if(counted_bars > 0) counted_bars--; limit = Bars - counted_bars; if(counted_bars==0) limit-=period; //---- for(int x = 0; x < limit; x++) { middle[x] = iMA(NULL, 0, period, 0, MODE_SMA, PRICE_TYPICAL, x); avg = findAvg(period, x); upper[x] = middle[x] + avg; lower[x] = middle[x] - avg; } return(0); } //+------------------------------------------------------------------+ //| | //+------------------------------------------------------------------+ double findAvg(int per, int shift) { double sum = 0; for(int x = shift; x < (shift + per); x++) { sum += High[x] - Low[x]; } sum = sum / per; return(sum); } //+------------------------------------------------------------------+