//+------------------------------------------------------------------+
//|                                                   MACD cross.mq4 |
//|                                      Copyright © 2006, Eli hayun |
//|                                                                  |
//+------------------------------------------------------------------+
#property copyright "Copyright © 2006, Eli hayun"
#property link      ""

#property indicator_chart_window
#property indicator_buffers 2
#property indicator_color1 Blue
#property indicator_color2 Red
//---- input parameters
extern int       fastEma=38;
extern int       slowEma=120;
extern int       macdSma=20;
extern bool      UseAlert=false;
//---- buffers
double ExtMapBuffer1[];
double ExtMapBuffer2[];
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int init()
  {
//---- indicators
   SetIndexStyle(0,DRAW_ARROW);
   SetIndexArrow(0,233);
   SetIndexBuffer(0,ExtMapBuffer1);
   SetIndexEmptyValue(0,0.0);
   SetIndexStyle(1,DRAW_ARROW);
   SetIndexArrow(1,234);
   SetIndexBuffer(1,ExtMapBuffer2);
   SetIndexEmptyValue(1,0.0);
//----
   return(0);
  }
//+------------------------------------------------------------------+
//| Custom indicator deinitialization function                       |
//+------------------------------------------------------------------+
int deinit()
  {
//----
   
//----
   return(0);
  }
//+------------------------------------------------------------------+
//| Custom indicator iteration function                              |
//+------------------------------------------------------------------+
int start()
  {
   int limit;
   int counted_bars=IndicatorCounted();
//---- check for possible errors
   if(counted_bars<0) return(-1);
//---- last counted bar will be recounted
   if(counted_bars>0) counted_bars--;
   limit=Bars-counted_bars;
//---- main loop
   for(int i=0; i<limit; i++)
     {
         ExtMapBuffer1[i] = 0; ExtMapBuffer2[i] = 0;
         double macdMain0 = iMACD(NULL, 0, fastEma, slowEma, macdSma, PRICE_CLOSE, MODE_MAIN, i);
         double macdMain2 = iMACD(NULL, 0, fastEma, slowEma, macdSma, PRICE_CLOSE, MODE_MAIN, i+1);

         double macdSignal0 = iMACD(NULL, 0, fastEma, slowEma, macdSma, PRICE_CLOSE, MODE_SIGNAL, i);
         double macdSignal2 = iMACD(NULL, 0, fastEma, slowEma, macdSma, PRICE_CLOSE, MODE_SIGNAL, i+1);
         
         if (macdMain0 > macdSignal0 && macdMain2 < macdSignal2)
            ExtMapBuffer1[i] = iLow(NULL, 0, i+1);
         if (macdMain0 < macdSignal0 && macdMain2 > macdSignal2)
            ExtMapBuffer2[i] = iHigh(NULL, 0, i+1);
     }
   return(0);
  }
//+------------------------------------------------------------------+