Inverse fisher transform of Stochastic

//+------------------------------------------------------------------+
//|                       Inverse fisher transform of Stochastic.mq4 |
//|                                                           mladen |
//+------------------------------------------------------------------+
#property  copyright "mladen"
#property  link      "mladenfx@gmail.com"

#property  indicator_separate_window
#property  indicator_buffers   5
#property  indicator_color1    Green
#property  indicator_color2    Green
#property  indicator_color3    Red
#property  indicator_color4    Red
#property  indicator_color5    DimGray
#property  indicator_width1    2
#property  indicator_width3    2
#property  indicator_width5    2
#property  indicator_maximum   1
#property  indicator_minimum  -1

//
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extern int    StochKPeriod  =  14;
extern int    StochSlowing  =  3;
extern int    StochPrice    =  0;
extern int    MAPeriod      =  9;
extern int    MAMode        =  MODE_LWMA;
extern bool   ShowHistogram =  true;
extern bool   ShowLevels    =  true; 
extern double Level1        =  0.5;
extern double Level2        =  0.0;
extern double Level3        = -0.5;
extern color  ZoneColor     = C'30,33,36';

//
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//
//
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double   buffer1[];
double   buffer2[];
double   buffer3[];
double   buffer4[];
double   buffer5[];
double   buffer6[];
double   buffer7[];

//
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//

string ShortName;

//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
//
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int init()
{
   IndicatorBuffers(7);
   SetIndexBuffer(0,buffer1);
   SetIndexBuffer(1,buffer2);
   SetIndexBuffer(2,buffer3);
   SetIndexBuffer(3,buffer4);
   SetIndexBuffer(4,buffer5);
   SetIndexBuffer(5,buffer6);
   SetIndexBuffer(6,buffer7);
      SetIndexStyle(0,DRAW_HISTOGRAM);
      SetIndexStyle(1,DRAW_HISTOGRAM);
      SetIndexStyle(2,DRAW_HISTOGRAM);
      SetIndexStyle(3,DRAW_HISTOGRAM);
   
   //
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   ShortName=MakeUniqueName("Inverse fisher Stochastic "," ("+StochKPeriod+","+StochSlowing+","+MAPeriod+")");
   IndicatorShortName(ShortName);
   return(0);
}
int deinit()
{
   DeleteBounds();
   return(0);
}

//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
//
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int start()
{
   int    limit, i; 
   int    counted_bars=IndicatorCounted();
   
   if(counted_bars<0) return(-1);
   if(counted_bars>0) counted_bars--;
           limit=Bars-counted_bars;

   //
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   //
   //
   //

   for(i=limit; i>=0; i--) buffer7[i] = 0.1*(iStochastic(NULL,0,StochKPeriod,1,StochSlowing,MODE_SMA,StochPrice,MODE_MAIN,i)-50);
   for(i=limit; i>=0; i--)
   {
      buffer6[i] = iMAOnArray(buffer7,0,MAPeriod,0,MAMode,i);
      buffer5[i] = (MathExp(2*buffer6[i])-1)/(MathExp(2*buffer6[i])+1);

      //
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      if(ShowHistogram)
      {
         if(buffer5[i]==buffer5[i+1])
         {
            buffer1[i]=buffer1[i+1];
            buffer2[i]=buffer2[i+1];
            buffer3[i]=buffer3[i+1];
            buffer4[i]=buffer4[i+1];
               continue;
         }                        

         //
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         //
         //
      
            buffer1[i]=EMPTY_VALUE;
            buffer2[i]=EMPTY_VALUE;
            buffer3[i]=EMPTY_VALUE;
            buffer4[i]=EMPTY_VALUE;
            if(ShowLevels)
               if((buffer5[i]<Level1) && (buffer5[i]>Level3))
                  continue;
      
            //
            //
            //
            //
            //
            
            if(buffer5[i]<0)
            {
               if (buffer5[i]<buffer5[i+1]) buffer3[i]=buffer5[i];
               if (buffer5[i]>buffer5[i+1]) buffer4[i]=buffer5[i];
            }
            if(buffer5[i]>0)
            {
               if (buffer5[i]<buffer5[i+1]) buffer2[i]=buffer5[i];
               if (buffer5[i]>buffer5[i+1]) buffer1[i]=buffer5[i];
            }
      }
   }

   //
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   if (ShowLevels) UpdateBounds();
   return(0);
}

//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
//
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string MakeUniqueName(string first, string rest)
{
   string result = first+(MathRand()%1001)+rest;

   while (WindowFind(result)> 0)
          result = first+(MathRand()%1001)+rest;
   return(result);
}


//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
//
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void DeleteBounds()
{
   ObjectDelete(ShortName+"-1");
   ObjectDelete(ShortName+"-2");
   ObjectDelete(ShortName+"-3");
}
void UpdateBounds()
{
   SetUpBound(ShortName+"-1",1          ,Level1);
   SetUpBound(ShortName+"-2",Level2*1.01,Level2*0.99);
   SetUpBound(ShortName+"-3",Level3     ,      -1.00);
}
void SetUpBound(string name, double up, double down)
{
   if (ObjectFind(name) == -1)
      {
         ObjectCreate(name,OBJ_RECTANGLE,WindowFind(ShortName),0,0);
         ObjectSet(name,OBJPROP_PRICE1,up);
         ObjectSet(name,OBJPROP_PRICE2,down);
         ObjectSet(name,OBJPROP_COLOR,ZoneColor);
         ObjectSet(name,OBJPROP_BACK,true);
         ObjectSet(name,OBJPROP_TIME1,iTime(NULL,0,Bars-1));
      }
   if (ObjectGet(name,OBJPROP_TIME2) != iTime(NULL,0,0))
       ObjectSet(name,OBJPROP_TIME2,    iTime(NULL,0,0));
}