//+------------------------------------------------------------------+
//|                          Indicator: ENGULFING CANDLE PATTERN.mq5 |
//|                                       Created with EABuilder.com |
//|                                        https://www.eabuilder.com |
//+------------------------------------------------------------------+
#property copyright "Created with EABuilder.com"
#property link      "https://www.eabuilder.com"
#property version   "1.00"
#property description "Made by Gingi_Index"

//--- indicator settings
#property indicator_chart_window
#property indicator_buffers 2
#property indicator_plots 2

#property indicator_type1 DRAW_ARROW
#property indicator_width1 2
#property indicator_color1 0x229C06
#property indicator_label1 "Buy"

#property indicator_type2 DRAW_ARROW
#property indicator_width2 2
#property indicator_color2 0x0707FA
#property indicator_label2 "Sell"

#define PLOT_MAXIMUM_BARS_BACK 5000
#define OMIT_OLDEST_BARS 50

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

input int Body_Candle_Pips = 5;
double myPoint; //initialized in OnInit
double Open[];
double Close[];
double Low[];
double High[];

void myAlert(string type, string message)
  {
   if(type == "print")
      Print(message);
   else if(type == "error")
     {
      Print(type+" | ENGULFING CANDLE PATTERN @ "+Symbol()+","+IntegerToString(Period())+" | "+message);
     }
   else if(type == "order")
     {
     }
   else if(type == "modify")
     {
     }
  }

double CandlestickBodyLength(ENUM_TIMEFRAMES timeframe, int shift)
  {
   double cOpen[];
   CopyOpen(Symbol(), timeframe, shift, 1, cOpen);
   ArraySetAsSeries(cOpen, true);
   double cClose[];
   CopyClose(Symbol(), timeframe, shift, 1, cClose);
   ArraySetAsSeries(cClose, true);
   return(MathAbs(cOpen[0] - cClose[0]));
  }

//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int OnInit()
  {   
   SetIndexBuffer(0, Buffer1);
   PlotIndexSetDouble(0, PLOT_EMPTY_VALUE, EMPTY_VALUE);
   PlotIndexSetInteger(0, PLOT_DRAW_BEGIN, MathMax(Bars(Symbol(), PERIOD_CURRENT)-PLOT_MAXIMUM_BARS_BACK+1, OMIT_OLDEST_BARS+1));
   PlotIndexSetInteger(0, PLOT_ARROW, 233);
   SetIndexBuffer(1, Buffer2);
   PlotIndexSetDouble(1, PLOT_EMPTY_VALUE, EMPTY_VALUE);
   PlotIndexSetInteger(1, PLOT_DRAW_BEGIN, MathMax(Bars(Symbol(), PERIOD_CURRENT)-PLOT_MAXIMUM_BARS_BACK+1, OMIT_OLDEST_BARS+1));
   PlotIndexSetInteger(1, PLOT_ARROW, 234);
   //initialize myPoint
   myPoint = Point();
   if(Digits() == 5 || Digits() == 3)
     {
      myPoint *= 10;
     }
   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[])
  {
   int limit = rates_total - prev_calculated;
   //--- counting from 0 to rates_total
   ArraySetAsSeries(Buffer1, true);
   ArraySetAsSeries(Buffer2, true);
   //--- initial zero
   if(prev_calculated < 1)
     {
      ArrayInitialize(Buffer1, EMPTY_VALUE);
      ArrayInitialize(Buffer2, EMPTY_VALUE);
     }
   else
      limit++;
   
   if(CopyOpen(Symbol(), PERIOD_CURRENT, 0, rates_total, Open) <= 0) return(rates_total);
   ArraySetAsSeries(Open, true);
   if(CopyClose(Symbol(), PERIOD_CURRENT, 0, rates_total, Close) <= 0) return(rates_total);
   ArraySetAsSeries(Close, true);
   if(CopyLow(Symbol(), PERIOD_CURRENT, 0, rates_total, Low) <= 0) return(rates_total);
   ArraySetAsSeries(Low, true);
   if(CopyHigh(Symbol(), PERIOD_CURRENT, 0, rates_total, High) <= 0) return(rates_total);
   ArraySetAsSeries(High, true);
   //--- main loop
   for(int i = limit-1; i >= 0; i--)
     {
      if (i >= MathMin(PLOT_MAXIMUM_BARS_BACK-1, rates_total-1-OMIT_OLDEST_BARS)) continue; //omit some old rates to prevent "Array out of range" or slow calculation   
      
      //Indicator Buffer 1
      if(Open[i] < Close[i] //Candlestick Open < Candlestick Close
      && Open[1+i] > Close[1+i] //Candlestick Open > Candlestick Close
      && Open[2+i] > Close[2+i] //Candlestick Open > Candlestick Close
      && Close[i] > Open[1+i] //Candlestick Close > Candlestick Open
      && CandlestickBodyLength(PERIOD_CURRENT, i) > Body_Candle_Pips * myPoint //Candlestick Body Length > fixed value
      )
        {
         Buffer1[i] = Low[i] - Body_Candle_Pips * myPoint; //Set indicator value at Candlestick Low - fixed value
        }
      else
        {
         Buffer1[i] = EMPTY_VALUE;
        }
      //Indicator Buffer 2
      if(Open[i] > Close[i] //Candlestick Open > Candlestick Close
      && Open[1+i] < Close[1+i] //Candlestick Open < Candlestick Close
      && Open[2+i] < Close[2+i] //Candlestick Open < Candlestick Close
      && Close[i] < Open[1+i] //Candlestick Close < Candlestick Open
      && CandlestickBodyLength(PERIOD_CURRENT, i) > Body_Candle_Pips * myPoint //Candlestick Body Length > fixed value
      )
        {
         Buffer2[i] = High[i] + Body_Candle_Pips * myPoint; //Set indicator value at Candlestick High + fixed value
        }
      else
        {
         Buffer2[i] = EMPTY_VALUE;
        }
     }
   return(rates_total);
  }
//+------------------------------------------------------------------+