#property copyright "x"
#property link      "x"
#property version   "1.20"
#property strict
#property indicator_separate_window
#property indicator_buffers 3
#property indicator_plots   1

//--- plot Buffer
#property indicator_label1  "Buffer2"
#property indicator_type1   DRAW_LINE
#property indicator_color1  clrRed
#property indicator_style1  STYLE_SOLID
#property indicator_width1  1

//--- input parameters
input int      barsLimit=0;
input int      maPeriod=13;
input int      maMode=3;
input int      maPeriod2=13;
input int      maMode2=0;
input double   adjNum1=1.0;
input double   adjNumPow=2.0;

bool     recalculateBars=true;
bool     recalculateBars2=true;
bool     recalculateBars3=true;


//--- indicator buffers
double         Buffer0[];
double         Buffer1[];
double         Buffer2[];

//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int OnInit()
  {
//--- indicator buffers mapping
   SetIndexBuffer(0,Buffer2);
   SetIndexBuffer(1,Buffer0);
   SetIndexBuffer(2,Buffer1);
   
   recalculateBars=true;
   recalculateBars2=true;
   recalculateBars3=true;
   
//---
   return(INIT_SUCCEEDED);
  }
//+------------------------------------------------------------------+
//| Custom indicator iteration function                              |
//+------------------------------------------------------------------+
int OnCalculate(const int rates_total,
                const int prev_calculated,
                const datetime &time[],
                const double &open[],
                const double &high[],
                const double &low[],
                const double &close[],
                const long &tick_volume[],
                const long &volume[],
                const int &spread[])
  {
//---

   CalculateHL();
      
   CalculateMA();
      
   CalculatePow();

   
//--- return value of prev_calculated for next call
   return(rates_total);
  }
//+------------------------------------------------------------------+



void CalculateHL()
{
   int i;
   for(i=barsToCalculate();i>=0;i--)
   {
      double priceHigh = iHigh(Symbol(), Period(), i);
      double priceLow = iLow(Symbol(), Period(), i);
      
      if(priceLow != 0) 
      { 
         Buffer0[i] = priceHigh / priceLow;
      }
      else
      {
         Buffer0[i] = 0;
      }
   }
}


void CalculateMA()
{
   int i;
   for(i=barsToCalculate2();i>=0;i--)
   {
      Buffer1[i] = iMAOnArray(Buffer0, 0, maPeriod, 0, (ENUM_MA_METHOD)maMode, i); 
   }
}


int barsToCalculate()
{
   int limit;
   if(recalculateBars==true) 
   {
      if(barsLimit==0) { limit=Bars-20; }
      else { limit=barsLimit; }
      recalculateBars=false;
   }
   else limit=0;
   return(limit);
}


void CalculatePow()
{
   int i;
   for(i=barsToCalculate3();i>=0;i--)
   {
      if(Buffer1[i] != 0)
      {
         Buffer2[i] = adjNum1 / (MathPow(Buffer1[i], adjNumPow));
      }
      else
      {
         Buffer2[i] = 0;
      }
   }
}


int barsToCalculate2()
{
   int limit;
   if(recalculateBars2==true) 
   {
      if(barsLimit==0) { limit=Bars-20; }
      else { limit=barsLimit; }
      recalculateBars2=false;
   }
   else limit=0;
   return(limit);
}


int barsToCalculate3()
{
   int limit;
   if(recalculateBars3==true) 
   {
      if(barsLimit==0) { limit=Bars-20; }
      else { limit=barsLimit; }
      recalculateBars3=false;
   }
   else limit=0;
   return(limit);
}