//+------------------------------------------------------------------+
//|                                             NormalizedVolume.mq4 |
//|                         Copyright © Vadim Shumilov (DrShumiloff) |
//|                                                shumiloff@mail.ru |
//+------------------------------------------------------------------+
#property copyright "Vadim Shumilov (DrShumiloff)"
#property link      "shumiloff@mail.ru"
//----
#property indicator_separate_window
#property indicator_buffers 1
#property indicator_color1 LightSeaGreen

extern int VolumePeriod = 9;

double VolBuffer[];

int init()
  {
   string short_name;

   IndicatorBuffers(1);
   SetIndexBuffer(1, VolBuffer);
   SetIndexStyle(0, DRAW_LINE);
   SetIndexBuffer(0, VolBuffer);
   SetIndexDrawBegin(0, VolBuffer);
  
   short_name="Normalized Volume(" + VolumePeriod + ")";
   IndicatorShortName(short_name);
   SetIndexLabel(0, short_name);

   return(0);
  }

int start()
  {
   int counted_bars = IndicatorCounted();

   if (counted_bars < 1)
      for (int i = 1; i <= VolumePeriod; i++) VolBuffer[Bars-i] = 0.0;

   int limit = Bars - counted_bars;
   if (counted_bars > 0) limit++;

   for(i = 0; i < limit; i++)
   {
      VolBuffer[i] = NormalizedVolume(i);
   }
   
   return(0);
  }

double NormalizedVolume(int i)
{
   double nv = 0;
   for (int j = i; j < (i+VolumePeriod); j++) nv = nv + Volume[j];
   nv = nv / VolumePeriod;
   return (Volume[i] / nv);
}