//+------------------------------------------------------------------+
//|                                                   Chertochka.mq4 |
//|                                              Copyright 2019, AM2 |
//|                                      http://www.forexsystems.biz |
//+------------------------------------------------------------------+
#property copyright "Copyright 2019, AM2"
#property link      "http://www.forexsystems.biz"
#property version   "1.00"
#property strict
#property indicator_separate_window

#property  indicator_buffers 4

input int count=111;

//--- indicator buffers
double  hi_up[];
double  lo_up[];
double  hi_dn[];
double  lo_dn[];
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int OnInit()
  {
//--- indicator buffers mapping
   SetIndexStyle(0,DRAW_HISTOGRAM,0,2,Blue);
   SetIndexStyle(1,DRAW_HISTOGRAM,0,2,Blue);
   SetIndexStyle(2,DRAW_HISTOGRAM,0,2,Red);
   SetIndexStyle(3,DRAW_HISTOGRAM,0,2,Red);

   SetIndexBuffer(0,hi_up);
   SetIndexBuffer(1,lo_up);
   SetIndexBuffer(2,hi_dn);
   SetIndexBuffer(3,lo_dn);
//---
   return(INIT_SUCCEEDED);
  }
//+------------------------------------------------------------------+
//| Custom indicator iteration function                              |
//+------------------------------------------------------------------+
int OnCalculate(const int rates_total,
                const int prev_calculated,
                const datetime &time[],
                const double &open[],
                const double &high[],
                const double &low[],
                const double &close[],
                const long &tick_volume[],
                const long &volume[],
                const int &spread[])
  {
//---
   for(int i=0;i<count;i++)
     {
      if(close[i]>open[i])
        {
         hi_up[i]=(high[i]-close[i])/_Point;
         lo_up[i]=(low[i]-open[i])/_Point;
        }
      if(close[i]<open[i])
        {
         hi_dn[i]=(high[i]-open[i])/_Point;
         lo_dn[i]=(low[i]-close[i])/_Point;
        }
     }

//--- return value of prev_calculated for next call
   return(rates_total);
  }
//+------------------------------------------------------------------+