dex_MACDPVT

//+------------------------------------------------------------------+
//|                                                  dex_MACDPVT.mq4 |
//|                                        Copyright © 2006, akadex. |
//|                                                           tohell |
//+------------------------------------------------------------------+

#property copyright "Copyright © 2006, akadex"
#property link      "tohell"

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

//---- input parameters
extern int Price     =4;
extern int BarsBack  =1;
extern int SmoothSlow  =26;
extern int SmoothFast  =12;
extern int SmoothSignal=9;
//---- buffers
double PVT[],PVTslow[],PVTfast[],PVTtemp[],PVTSignal[];

//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int init()
{
//---- indicator buffer mapping
   IndicatorBuffers(5);
   SetIndexBuffer(0,PVT);
   SetIndexBuffer(1,PVTSignal);
   SetIndexBuffer(2,PVTslow);
   SetIndexBuffer(3,PVTfast);
   SetIndexBuffer(4,PVTtemp);
//---- indicator line
   SetIndexStyle(0,DRAW_HISTOGRAM,STYLE_SOLID,2);
   SetIndexStyle(1,DRAW_LINE,STYLE_DOT,1);
//---- name for DataWindow and indicator subwindow label
   string short_name="dex_MACDPVT("+SmoothSlow+","+SmoothFast+","+SmoothSignal+")";
   IndicatorShortName(short_name);
   SetIndexLabel(0,"MACDPVT");
   SetIndexLabel(1,"PVTSignal");
   SetIndexDrawBegin(0,BarsBack);
   SetIndexDrawBegin(1,BarsBack);

//----
   return(0);
}
//+------------------------------------------------------------------+
//| Price and Volume Trend                                           |
//+------------------------------------------------------------------+
int start()
{
   int   i,limit,counted_bars=IndicatorCounted();
   if(counted_bars>0) counted_bars--;
   if(counted_bars==0) limit=Bars-BarsBack;
   limit=Bars-counted_bars+BarsBack;
//---- 
   for(i=limit; i>=0; i--)
   {
      if(i==Bars-BarsBack) {PVTtemp[i]=Volume[i];}
      else
      {
      double CurPrice  = iMA(NULL,0,1,0,0,Price,i);
      double PrevPrice = iMA(NULL,0,1,0,0,Price,i+BarsBack);
      
      if(PrevPrice>0)
      PVTtemp[i] = Volume[i]*(CurPrice-PrevPrice)/PrevPrice + PVTtemp[i+1]; 
       
      }
   }
     for(i=limit; i>=0; i--)
     {
     PVTslow[i]=iMAOnArray(PVTtemp,0,SmoothSlow,0,MODE_EMA,i);
     PVTfast[i]=iMAOnArray(PVTtemp,0,SmoothFast,0,MODE_EMA,i);
     PVT[i]=PVTfast[i]-PVTslow[i];
     }
     for(i=limit; i>=0; i--)
     PVTSignal[i]=iMAOnArray(PVT,0,SmoothSignal,0,MODE_EMA,i);
     
//----
   return(0);
}