Engulfing Pattern Plus One

ÿþ//+------------------------------------------------------------------+

//|                                   Engulfing Pattern Plus One.mq5 |

//|                              Copyright © 2022, Vladimir Karputov |

//|                      https://www.mql5.com/en/users/barabashkakvn |

//+------------------------------------------------------------------+

#property copyright "Copyright © 2022, Vladimir Karputov"

#property link      "https://www.mql5.com/en/users/barabashkakvn"

#property version   "1.00"

#property indicator_chart_window

#property indicator_buffers 2

#property indicator_plots   2

//--- plot BUY

#property indicator_label1  "BUY"

#property indicator_type1   DRAW_ARROW

#property indicator_color1  clrDeepSkyBlue

#property indicator_style1  STYLE_SOLID

#property indicator_width1  1

//--- plot SELL

#property indicator_label2  "SELL"

#property indicator_type2   DRAW_ARROW

#property indicator_color2  clrOrangeRed

#property indicator_style2  STYLE_SOLID

#property indicator_width2  1

//--- input parameters

input group             "Arrows"

input uchar                Inp_BUY_ArrowCode       = 116;      // Arrow 'BUY': code (font Wingdings)

input int                  Inp_BUY_ArrowShift      = 10;       // Arrow 'BUY': vertical shift in pixel

input uchar                Inp_SELL_ArrowCode      = 116;      // Arrow 'SELL': code (font Wingdings)

input int                  Inp_SELL_ArrowShift     = 10;       // Arrow 'SELL': vertical shift in pixel

//--- indicator buffers

double   BUYBuffer[];

double   SELLBuffer[];

//+------------------------------------------------------------------+

//| Custom indicator initialization function                         |

//+------------------------------------------------------------------+

int OnInit()

  {

//--- indicator buffers mapping

   SetIndexBuffer(0,BUYBuffer,INDICATOR_DATA);

   SetIndexBuffer(1,SELLBuffer,INDICATOR_DATA);

//--- setting a code from the Wingdings charset as the property of PLOT_ARROW

   PlotIndexSetInteger(0,PLOT_ARROW,Inp_BUY_ArrowCode);

   PlotIndexSetInteger(1,PLOT_ARROW,Inp_SELL_ArrowCode);

//--- set the vertical shift of arrows in pixels

   PlotIndexSetInteger(0,PLOT_ARROW_SHIFT,Inp_BUY_ArrowShift);

   PlotIndexSetInteger(1,PLOT_ARROW_SHIFT,-Inp_SELL_ArrowShift);

//--- an empty value for plotting, for which there is no drawing

   PlotIndexSetDouble(0,PLOT_EMPTY_VALUE,0.0);

   PlotIndexSetDouble(1,PLOT_EMPTY_VALUE,0.0);

//---

   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[])

  {

//---

   if(rates_total<3)

      return(0);

   int limit=prev_calculated-1;

   if(prev_calculated==0)

     {

      limit=2;

      for(int i=0; i<limit; i++)

        {

         BUYBuffer[i]=0.0;

         SELLBuffer[i]=0.0;

        }

     }

   for(int i=limit; i<rates_total; i++)

     {

      BUYBuffer[i]=0.0;

      SELLBuffer[i]=0.0;

      if(high[i]>=high[i-1] && high[i]>=high[i-2])

         if(low[i]<=low[i-1] && low[i]<=low[i-2])

           {

            if(open[i]<close[i])

               BUYBuffer[i]=low[i];

            else

               SELLBuffer[i]=high[i];

           }

     }

//--- return value of prev_calculated for next call

   return(rates_total);

  }

//+------------------------------------------------------------------+