//+------------------------------------------------------------------+
//|                                          AbsoluteStrength_v1.mq4 |
//|                           Copyright © 2006, TrendLaboratory Ltd. |
//|            http://finance.groups.yahoo.com/group/TrendLaboratory |
//|                                       E-mail: igorad2004@list.ru |
//+------------------------------------------------------------------+
//| Modifications:                                                   |
//| - AbsoluteStrengthHisto_v1, 2006/06/26:                          |
//|   Put in Histogram form with 2 level lines                       |
//|   ph_bresson@yahoo.com                                           |
//+------------------------------------------------------------------+
#property copyright "Copyright © 2006, TrendLaboratory Ltd."
#property link      "http://finance.groups.yahoo.com/group/TrendLaboratory"
//----
#property indicator_separate_window
#property indicator_buffers   4
#property indicator_color1    Blue
#property indicator_width1    3
#property indicator_color2    Red
#property indicator_width2    3
#property indicator_color3    DeepSkyBlue
#property indicator_width3    1
#property indicator_color4    Red
#property indicator_width4    1
//---- input parameters
extern int       Mode =0;   // 0-RSI method; 1-Stoch method
extern int       Length= 9; // Period
extern int       Smooth= 1; // Period of smoothing
extern int       Signal= 4; // Period of Signal Line
extern int       Price=0;   // Price mode : 0-Close,1-Open,2-High,3-Low,4-Median,5-Typical,6-Weighted
extern int       ModeMA= 3; // Mode of Moving Average
extern int       Mode_Histo =3;
//---- buffers
double Bulls[];
double Bears[];
double AvgBulls[];
double AvgBears[];
double SmthBulls[];
double SmthBears[];
double SigBulls[];
double SigBears[];
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int init()
  {
//---- indicators
   IndicatorBuffers(8);
   SetIndexStyle(0,DRAW_HISTOGRAM,EMPTY,3);
   SetIndexBuffer(0,SmthBulls);
   SetIndexStyle(1,DRAW_HISTOGRAM,EMPTY,3);
   SetIndexBuffer(1,SmthBears);
   //
   SetIndexStyle(2,DRAW_LINE,EMPTY,1);
   SetIndexBuffer(2,SigBulls);
   SetIndexStyle(3,DRAW_LINE,EMPTY,1);
   SetIndexBuffer(3,SigBears);
   //
   SetIndexBuffer(4,Bulls);
   SetIndexBuffer(5,Bears);
   SetIndexBuffer(6,AvgBulls);
   SetIndexBuffer(7,AvgBears);
//---- name for DataWindow and indicator subwindow label
   string short_name="AbsoluteStrengthHistogram("+Mode+","+Length+","+Smooth+","+Signal+",,"+ModeMA+")";
   IndicatorShortName(short_name);
   SetIndexLabel(0,"Bulls");
   SetIndexLabel(1,"Bears");
   SetIndexLabel(2,"Bulls");
   SetIndexLabel(3,"Bears");
   //
   SetIndexDrawBegin(0,Length+Smooth+Signal);
   SetIndexDrawBegin(1,Length+Smooth+Signal);
   SetIndexDrawBegin(2,Length+Smooth+Signal);
   SetIndexDrawBegin(3,Length+Smooth+Signal);
   //
   SetIndexEmptyValue(0,0.0);
   SetIndexEmptyValue(1,0.0);
   SetIndexEmptyValue(2,0.0);
   SetIndexEmptyValue(3,0.0);
   SetIndexEmptyValue(4,0.0);
   SetIndexEmptyValue(5,0.0);
   SetIndexEmptyValue(6,0.0);
   SetIndexEmptyValue(7,0.0);
//----
   return(0);
  }
//+------------------------------------------------------------------+
//| Custom indicator iteration function                              |
//+------------------------------------------------------------------+
int start()
  {
   int      shift, limit, counted_bars=IndicatorCounted();
   double   Price1, Price2, smax, smin;
//---- 
   if(counted_bars < 0)return(-1);
   if(counted_bars ==0)limit=Bars-Length+Smooth+Signal-1;
   if(counted_bars < 1)
      for(int i=1;i<Length+Smooth+Signal;i++)
        {
         Bulls[Bars-i]=0;
         Bears[Bars-i]=0;
         AvgBulls[Bars-i]=0;
         AvgBears[Bars-i]=0;
         SmthBulls[Bars-i]=0;
         SmthBears[Bars-i]=0;
         SigBulls[Bars-i]=0;
         SigBears[Bars-i]=0;
        }
   if(counted_bars>0) limit=Bars-counted_bars;
   limit--;
//----
   for( shift=limit; shift>=0; shift--)
     {
      Price1=iMA(NULL,0,1,0,0,Price,shift);
      Price2=iMA(NULL,0,1,0,0,Price,shift+1);
//----
      if (Mode==0)
        {
         Bulls[shift]=0.5*(MathAbs(Price1-Price2)+(Price1-Price2));
         Bears[shift]=0.5*(MathAbs(Price1-Price2)-(Price1-Price2));
        }
      if (Mode==1)
        {
         smax=High[Highest(NULL,0,MODE_HIGH,Length,shift)];
         smin=Low[Lowest(NULL,0,MODE_LOW,Length,shift)];
         Bulls[shift]=Price1 - smin;
         Bears[shift]=smax - Price1;
        }
     }
   for( shift=limit; shift>=0; shift--)
     {
      AvgBulls[shift]=iMAOnArray(Bulls,0,Length,0,ModeMA,shift);
      AvgBears[shift]=iMAOnArray(Bears,0,Length,0,ModeMA,shift);
     }
   for( shift=limit; shift>=0; shift--)
     {
      SmthBulls[shift]=iMAOnArray(AvgBulls,0,Smooth,0,ModeMA,shift);
      SmthBears[shift]=iMAOnArray(AvgBears,0,Smooth,0,ModeMA,shift);
     }
   if(Mode_Histo==1)
     {
      for( shift=limit; shift>=0; shift--)
        {
         if(SmthBulls[shift]-SmthBears[shift]>0)
           {
            SetIndexStyle(0,DRAW_HISTOGRAM,EMPTY,5);
            SetIndexStyle(1,DRAW_LINE,EMPTY,2);
            SmthBears[shift]= SmthBears[shift]/Point;
            SmthBulls[shift]= SmthBulls[shift]/Point;
           }
         else
           {
            SetIndexStyle(1,DRAW_HISTOGRAM,EMPTY,5);
            SetIndexStyle(0,DRAW_LINE,EMPTY,2);
            SmthBears[shift]= SmthBears[shift]/Point;
            SmthBulls[shift]= SmthBulls[shift]/Point;
           }
        }  //end for( shift=limit; shift>=0; shift--)
     }     // end if(Mode_Histo == 1)
   else
      if(Mode_Histo==2)
        {
         for( shift=limit; shift>=0; shift--)
           {
            if(SmthBulls[shift]-SmthBears[shift]>0)
              {
               SmthBears[shift]=-SmthBears[shift]/Point;
               SmthBulls[shift]= SmthBulls[shift]/Point;
              }
            else
              {
               SmthBulls[shift]=-SmthBulls[shift]/Point;
               SmthBears[shift]= SmthBears[shift]/Point;
              }
           }  //end for( shift=limit; shift>=0; shift--)      
        }     //end if(Mode_Histo == 2)
      else
         if(Mode_Histo==3)
           {
            for( shift=limit; shift>=0; shift--)
              {
               SigBulls[shift]=  SmthBulls[shift];
               SigBears[shift]=  SmthBears[shift];
               if(SmthBulls[shift]-SmthBears[shift]>0)
                  SmthBears[shift]=0;
               else
                  SmthBulls[shift]=0;
              }  //end for( shift=limit; shift>=0; shift--)      
           }     //end if(Mode_Histo == 3)
         else
            if(Mode_Histo==4)
              {
               for( shift=limit; shift>=0; shift--)
                 {
                  if(SmthBulls[shift]-SmthBears[shift]>0)
                    {
                     SigBears[shift]=  SmthBears[shift];
                     SmthBears[shift]=0;
                    }
                  else
                    {
                     SigBulls[shift]=  SmthBulls[shift];
                     SmthBulls[shift]=0;
                    }
                 }  //end for( shift=limit; shift>=0; shift--)      
              }     //end if(Mode_Histo == 4)
//----
   return(0);
  }
//+------------------------------------------------------------------+