//+------------------------------------------------------------------+
//|                                                          003.mq4 |
//|                                                     Yuriy Tokman |
//|                                            yuriytokman@gmail.com |
//+------------------------------------------------------------------+
#property copyright "Yuriy Tokman"
#property link      "yuriytokman@gmail.com"

#property indicator_separate_window
#property indicator_buffers 2
#property indicator_color1 Lime
#property indicator_color2 Red

double buffer1[];
double buffer2[];
extern int       barsToProcess=1000;
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int init()
  {
//---- indicators
SetIndexStyle(0,DRAW_HISTOGRAM,STYLE_SOLID,2,Lime);
  SetIndexBuffer(0,buffer1);
  SetIndexStyle(1,DRAW_HISTOGRAM,STYLE_SOLID,2,Red);
  SetIndexBuffer(1,buffer2);
//----
   return(0);
  }
//+------------------------------------------------------------------+
//| Custom indicator deinitialization function                       |
//+------------------------------------------------------------------+
int deinit()
  {
//----
   
//----
   return(0);
  }
//+------------------------------------------------------------------+
//| Custom indicator iteration function                              |
//+------------------------------------------------------------------+
int start()
  {
   int    counted_bars=IndicatorCounted(),
//----
 limit;
   int i=0; 
   if(counted_bars>0)
      counted_bars--;
   
   limit=Bars-counted_bars;
   
   if(limit>barsToProcess)
      limit=barsToProcess;

   while (i<limit)
   {
   
   double k=(Open[i]-Close[i+1])/Point;
   if (k>0)
    buffer1[i]= k;
   if (k<0)
    buffer2[i]= k;
   i++;
   }    
//----
   return(0);
  }
//+------------------------------------------------------------------+