#property indicator_chart_window
#property indicator_buffers 2
#property indicator_color1 clrAquamarine
#property indicator_color2 clrAqua
#property indicator_width1 10
#property indicator_width2 10

double bodyHigh[];
double bodyLow[];

//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int OnInit()
  {
//---
   SetIndexBuffer(0,bodyHigh);
   SetIndexBuffer(1,bodyLow);
   SetIndexStyle(0,DRAW_HISTOGRAM);
   SetIndexStyle(1,DRAW_HISTOGRAM);
//---
   return(INIT_SUCCEEDED);
  }
//+------------------------------------------------------------------+
//| Custom indicator iteration function                              |
//+------------------------------------------------------------------+


bool upEngulfing(){

   // Second Candle
   double bodyBottomOne = MathMin(Open[1], Close[1]);
   double bodyUpOne = MathMax(Open[1], Close[1]);
   double bodyOne = bodyUpOne - bodyBottomOne;
   double lowerWickOne = bodyBottomOne - Low[1];
   double upperWickOne = High[1] - bodyUpOne;

   //First candle
   double bodyBottomTwo = MathMin(Open[2], Close[2]);
   double bodyUpTwo = MathMax(Open[2], Close[2]);
   double bodyTwo = bodyUpTwo - bodyBottomTwo;
   double lowerWickTwo = bodyBottomTwo - Low[2];
   double upperWickTwo = High[2] - bodyUpTwo;

   bool conditionOne = bodyUpOne >= bodyUpTwo && bodyBottomOne <= bodyBottomTwo;
   bool conditionTwo = lowerWickOne - lowerWickTwo > 0;
   bool conditionThree = upperWickOne <= 0.10*lowerWickOne;
   bool conditionFour = bodyUpOne > upperWickTwo;
   bool isUpEngulfing = conditionOne && conditionTwo && conditionThree && conditionFour;

   return isUpEngulfing;
}



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[])
  {
//---
  for(int i = Bars-2; i>=0; i--){

      double bodyHh = MathMax(Close[i],Open[i]);
      double bodyLw = MathMin(Close[i],Open[i]);
      if(upEngulfing()==True){

         bodyHigh[i] = bodyHh;
         bodyLow[i] = bodyLw;

      }

  }

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