Velocity_v2

//+------------------------------------------------------------------+
//|                                                  Velocity_v2.mq4 |
//|                                Copyright © 2006, TrendLaboratory |
//|            http://finance.groups.yahoo.com/group/TrendLaboratory |
//|                                   E-mail: igorad2003@yahoo.co.uk |
//+------------------------------------------------------------------+
#property copyright "Copyright © 2006, TrendLaboratory"
#property link      "http://finance.groups.yahoo.com/group/TrendLaboratory"

#property indicator_separate_window
#property indicator_buffers 2
#property indicator_color1 LightBlue
#property indicator_color2 Tomato
#property indicator_width1 2
#property indicator_width2 1
#property indicator_style2 2
//---- input parameters
extern int VelocityPeriod  =8;
extern int Slow            =5;
extern int MA_Mode         =1;
//---- indicator buffers
double FastBuffer[];
double SlowBuffer[];
double Vel[];
double AvgVel[];
double DbAvgVel[];
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
  int init()
  {
   string short_name;
//---- indicator line
   IndicatorBuffers(5);
   SetIndexStyle(0,DRAW_HISTOGRAM);
   SetIndexStyle(1,DRAW_LINE);
   SetIndexBuffer(0,FastBuffer);
   SetIndexBuffer(1,SlowBuffer);
   SetIndexBuffer(2,Vel);
   SetIndexBuffer(3,AvgVel);
   SetIndexBuffer(4,DbAvgVel);
   
   IndicatorDigits(MarketInfo(Symbol(),MODE_DIGITS));
//---- name for DataWindow and indicator subwindow label
   short_name="Velocity("+VelocityPeriod+")";
   IndicatorShortName(short_name);
   SetIndexLabel(0,"Fast");
   SetIndexLabel(1,"Slow");
//----
   SetIndexDrawBegin(0,3*VelocityPeriod+Slow);
   SetIndexDrawBegin(1,3*VelocityPeriod+Slow);
//----
   return(0);
  }

//+------------------------------------------------------------------+
//| Velocity_v2                                                      |
//+------------------------------------------------------------------+
int start()
  {
   int    shift, limit, counted_bars=IndicatorCounted();
        
   if ( counted_bars < 0 ) return(-1);
   if ( counted_bars ==0 ) limit=Bars-3*VelocityPeriod-Slow-1;
   if ( counted_bars < 1 ) 
   
   for(int i=1;i<3*VelocityPeriod+Slow;i++) 
   {
   Vel[Bars-i]=0;    
   AvgVel[Bars-i]=0;  
   DbAvgVel[Bars-i]=0;    
   FastBuffer[Bars-i]=0;  
   SlowBuffer[Bars-i]=0;    
   }
   
   if(counted_bars>0) limit=Bars-counted_bars;
   limit--;
      
	for(shift=limit;shift>=0;shift--) 
   Vel[shift]=(Close[shift]-Close[shift+1])/Point;  
   for(shift=limit;shift>=0;shift--) 
   AvgVel[shift]=iMAOnArray(Vel,0,VelocityPeriod,0,MA_Mode,shift);   
   for(shift=limit;shift>=0;shift--) 
   DbAvgVel[shift]=iMAOnArray(AvgVel,0,VelocityPeriod,0,MA_Mode,shift);  
   for(shift=limit;shift>=0;shift--) 
   FastBuffer[shift]=iMAOnArray(DbAvgVel,0,VelocityPeriod,0,MA_Mode,shift);
	for(shift=limit;shift>=0;shift--) 
   SlowBuffer[shift]=iMAOnArray(FastBuffer,0,Slow,0,MA_Mode,shift);         	  
	
	return(0);	
 }