//+------------------------------------------------------------------+
//|                                                        J_TPO.mq4 |
//|                      Copyright © 2004,                           |
//|                                                                  |
//+------------------------------------------------------------------+
#property copyright "Copyright © 2004, ."
#property link      ""

#property indicator_separate_window
#property indicator_minimum -1
#property indicator_maximum 1
#property indicator_buffers 1
#property indicator_color1 DodgerBlue
//---- input parameters
extern int       Len=10;
//---- buffers
double ExtMapBuffer1[];
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int init()
  {
//---- indicators
   SetIndexStyle(0,DRAW_LINE);
   SetIndexBuffer(0, ExtMapBuffer1);
//----
   return(0);
  }

//+------------------------------------------------------------------+
//| J_TPO indicatop                                                  |
//+------------------------------------------------------------------+
int start()
  {
   //int limit;
   //int counted_bars=IndicatorCounted();
//---- check for possible errors
   //if(counted_bars<0) return(-1);
//---- last counted bar will be recounted
   //if(counted_bars>0) counted_bars--;
   //limit=Bars-counted_bars;
//---- main loop
   
     double f0, f8, f10, f18, f20, f28, f30, f40, k,
      var14, var18, var1C, var20, var24, shift, value; 
     int f38, f48, var6, var12, varA, varE;
     double arr0[300], arr1[300], arr2[300], arr3[300]; 

   //f38=0;
   for(int i=Bars-Len-100; i>=0; i--)
     {
     var14=0; 
     var1C=0; 
     if(f38==0)  
      { 
      f38=1; 
      f40=0; 
      if (Len-1>= 2) f30=Len-1;
      else f30=2; 
      f48=f30+1; 
      f10=Close[i]; 
      arr0[f38] = Close[i]; 
      k=f48;
      f18 = 12 / (k * (k - 1) * (k + 1)); 
      f20 = (f48 + 1) * 0.5; 
      }  
     else  
      { 
      if (f38 <= f48) f38 = f38 + 1;
      else f38 = f48 + 1; 
      f8 = f10; 
      f10 = Close[i]; 
      if (f38 > f48)  
        {
        for (var6 = 2; var6<=f48; var6++) arr0[var6-1] = arr0[var6]; 
        arr0[f48] = Close[i]; 
        }
      else arr0[f38] = Close[i]; 
      if ((f30 >= f38) && (f8 != f10)) f40 = 1;   
      if ((f30 == f38) && (f40 == 0)) f38 = 0;   
     }
   
   if (f38 >= f48)  
      {
      for (varA=1; varA<=f48; varA++) 
         {
         arr2[varA] = varA; 
         arr3[varA] = varA; 
         arr1[varA] = arr0[varA];
         } 
      
      for (varA=1; varA<=(f48-1); varA++) 
         {
         var24 = arr1[varA]; 
         var12 = varA; 
         var6 = varA + 1; 
         for (var6=varA+1; var6<=f48; var6++)
            {
            if (arr1[var6] < var24) 
               {
               var24 = arr1[var6]; 
               var12 = var6;
               }
            } 
         
         var20 = arr1[varA]; 
         arr1[varA] = arr1[var12]; 
         arr1[var12] = var20; 
         var20 = arr2[varA]; 
         arr2[varA] = arr2[var12]; 
         arr2[var12] = var20;
         } 
      
      varA = 1; 
      while (f48 > varA) 
        {
        var6 = varA + 1; 
        var14 = 1; 
        var1C = arr3[varA]; 
        while (var14 != 0) 
          {
          if (arr1[varA] != arr1[var6])  
             {
             if ((var6 - varA) > 1) 
                {
                var1C = var1C / (var6 - varA); 
                varE = varA; 
                for (varE=varA; varE<=(var6-1); varE++)
                   arr3[varE] = var1C;
                
                } 
             var14 = 0; 
             }
          else 
             {
             var1C = var1C + arr3[var6]; 
             var6 = var6 + 1; 
             } 
          } 
        varA = var6; 
        } 
      var1C = 0; 
      for (varA=1; varA<=f48; varA++) 
        var1C = var1C + (arr3[varA] - f20) * (arr2[varA] - f20);
              
      var18 = f18 * var1C;
     }
   else 
     var18 = 0; 

   value = var18; 
   if (value == 0) value = 0.00001;

   ExtMapBuffer1[i]=value;
   }
//---- done
   return(0);
  }
//+------------------------------------------------------------------+