indicators/Keltner Channels.mq4

   1 //+------------------------------------------------------------------+\r
   2 //|                                             Keltner Channels.mq4 |\r
   3 //|                                                  Coded by Gilani |\r
   4 //|                      Copyright © 2005, MetaQuotes Software Corp. |\r
   5 //|                                        http://www.metaquotes.net |\r
   6 //+------------------------------------------------------------------+\r
   7 #property copyright "Copyright © 2005, MetaQuotes Software Corp."\r
   8 #property link      "http://www.metaquotes.net"\r
   9 //+------------------------------------------------------------------+\r
  10 //| Custom indicator initialization function                         |\r
  11 //+------------------------------------------------------------------+\r
  12 #property indicator_chart_window\r
  13 #property indicator_buffers 3\r
  14 #property indicator_color1 Red\r
  15 #property indicator_color2 Green\r
  16 #property indicator_color3 Black\r
  17 //----\r
  18 double upper[], middle[], lower[];\r
  19 extern int period=10;\r
  20 //----\r
  21 //+------------------------------------------------------------------+\r
  22 //|                                                                  |\r
  23 //+------------------------------------------------------------------+\r
  24 int init()\r
  25   {\r
  26    SetIndexStyle(0,DRAW_LINE);\r
  27    SetIndexShift(0,0);\r
  28    SetIndexDrawBegin(0,0);\r
  29    SetIndexBuffer(0,upper);\r
  30    SetIndexStyle(1,DRAW_LINE);\r
  31    SetIndexShift(1,0);\r
  32    SetIndexDrawBegin(1,0);\r
  33    SetIndexBuffer(1,middle);\r
  34    SetIndexStyle(2,DRAW_LINE);\r
  35    SetIndexShift(2,0);\r
  36    SetIndexDrawBegin(2,0);\r
  37    SetIndexBuffer(2,lower);\r
  38 //---- indicators\r
  39 //----\r
  40    return(0);\r
  41   }\r
  42 //+------------------------------------------------------------------+\r
  43 //| Custor indicator deinitialization function                       |\r
  44 //+------------------------------------------------------------------+\r
  45 int deinit()\r
  46   {\r
  47 //---- TODO: add your code here\r
  48 //----\r
  49    return(0);\r
  50   }\r
  51 //+------------------------------------------------------------------+\r
  52 //| Custom indicator iteration function                              |\r
  53 //+------------------------------------------------------------------+\r
  54   int start() \r
  55   {\r
  56    int limit;\r
  57    int counted_bars=IndicatorCounted();\r
  58    if(counted_bars<0) return(-1);\r
  59    if(counted_bars>0) counted_bars--;\r
  60    limit=Bars-counted_bars;\r
  61 //----\r
  62    double avg;\r
  63      for(int x=0; x<limit; x++) \r
  64      {\r
  65       middle[x]=iMA(NULL, 0, period, 0, MODE_SMA, PRICE_TYPICAL, x);\r
  66       avg =findAvg(period, x);\r
  67       upper[x]=middle[x] + avg;\r
  68       lower[x]=middle[x] - avg;\r
  69      }\r
  70    return(0);\r
  71   }\r
  72 //+------------------------------------------------------------------+\r
  73   double findAvg(int period, int shift) \r
  74   {\r
  75    double sum=0;\r
  76      for(int x=shift;x<(shift+period);x++) \r
  77      {\r
  78       sum+=High[x]-Low[x];\r
  79      }\r
  80    sum=sum/period;\r
  81    return(sum);\r
  82   }\r
  83 //+------------------------------------------------------------------+