//+------------------------------------------------------------------+
//|                                                 Tail_Bar_v01.mq4 |
//+------------------------------------------------------------------+
#property copyright "Inkov Evgeni ew123@mail.ru"
#property link      "+7-988-140-68-11"
//+------------------------------------------------------------------+
#property description "Tail_Bar"
#property strict
//--- indicator settings
#property  indicator_separate_window
#property  indicator_buffers    2
#property  indicator_color1 clrGreen
#property  indicator_color2 clrRed
#property  indicator_width1     2
#property  indicator_width2     2
//--- indicator buffers
double     BufferU[];
double     BufferD[];
double     Buffer[];
//+------------------------------------------------------------------+
void OnInit(void)
{
   IndicatorBuffers(3);
//--- drawing settings
   SetIndexStyle(0,DRAW_HISTOGRAM);
   SetIndexStyle(1,DRAW_HISTOGRAM);
   SetIndexStyle(2,DRAW_NONE);
//--- all indicator buffers mapping
   SetIndexBuffer(0,BufferU);
   SetIndexBuffer(1,BufferD);
   SetIndexBuffer(2,Buffer);
   
   IndicatorDigits(1);
   IndicatorShortName("Tail Bar");
}
//+------------------------------------------------------------------+
//| Accelerator/Decelerator Oscillator                               |
//+------------------------------------------------------------------+
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[])
{
   int counted_bars = IndicatorCounted();
//----
   int i, limit=0;
   if(counted_bars == 0) limit = Bars - 2;
   if(counted_bars >  0) limit = Bars - counted_bars; 

   for(i=0; i<limit; i++)
      Buffer[i]=((High[i]-MathMax(Close[i],Open[i]))-(MathMin(Close[i],Open[i])-Low[i]))/Point;

   for(i=limit; i>=0;i--)
      if(Buffer[i]<Buffer[i+1])
      {
         BufferU[i]=0.0;
         BufferD[i]=Buffer[i];
      }
      else
      {
         BufferU[i]=Buffer[i];
         BufferD[i]=0.0;
      }
//--- done
   return(rates_total);
  }
//+------------------------------------------------------------------+