Gaps OHLC

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

//|                                                    Gaps OHLC.mq5 |

//|                              Copyright © 2018, Vladimir Karputov |

//|                                           http://wmua.ru/slesar/ |

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

#property copyright "Copyright © 2018, Vladimir Karputov"

#property link      "http://wmua.ru/slesar/"

#property version   "1.002"

#property description "Gaps OHLC"

#property indicator_separate_window

#property indicator_buffers 2

#property indicator_plots   1

//--- input parameters

input ENUM_TIMEFRAMES   InpTimeFrame=PERIOD_CURRENT; // TimeFrame on which we are looking for gep

//--- plot Color_Histogram 

#property indicator_label1  "Gaps OHLC" 

#property indicator_type1   DRAW_COLOR_HISTOGRAM 

//--- define 8 colors for coloring sections (they are stored in a special array) 

#property indicator_color1  clrRed,clrBlue

#property indicator_style1  STYLE_SOLID

#property indicator_width1  2

//--- a buffer of values

double         Color_HistogramBuffer[];

//--- a buffer of color indexes

double         Color_HistogramColors[];

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

//| Custom indicator initialization function                         |

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

int OnInit()

  {

//--- indicator buffers mapping 

   SetIndexBuffer(0,Color_HistogramBuffer,INDICATOR_DATA);

   SetIndexBuffer(1,Color_HistogramColors,INDICATOR_COLOR_INDEX);

//---

   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<=1)

      return(0);

   int limit=prev_calculated-1;

   if(prev_calculated==0)

      limit=0;

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

     {

      if(i==0)

        {

         Color_HistogramBuffer[i]=0.0;

         Color_HistogramColors[i]=0;

         continue;

        }

      if(open[i]<low[i-1])

        {

         Color_HistogramBuffer[i]=(open[i]-low[i-1])/Point();

         Color_HistogramColors[i]=0;

        }

      else if(open[i]>high[i-1])

        {

         Color_HistogramBuffer[i]=(open[i]-high[i-1])/Point();

         Color_HistogramColors[i]=1;

        }

      else

        {

         Color_HistogramBuffer[i]=0.0;

         Color_HistogramColors[i]=0;

        }

     }

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

   return(rates_total);

  }

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