BarSpread

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#define     MName          "Bar Spread"

#define     MVersion       "1.000"

#define     MBuild         "2022-05-01 12:31 WEST"

#define     MCopyright     "Copyright \x00A9 2022, Fernando M. I. Carreiro, All rights reserved"

#define     MProfile       "https://www.mql5.com/en/users/FMIC"

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#property   version        MVersion

#property   description    MName

#property   description    "MetaTrader Indicator (Build "MBuild")"

#property   copyright      MCopyright

#property   link           MProfile

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//--- Setup



   #property indicator_separate_window



   // Define number of buffers and plots

      #property indicator_buffers   1

      #property indicator_plots     1



   // Define visual appearance of plots

      #property indicator_label1 "Spread (Bar)"

      #property indicator_color1 clrDodgerBlue

      #property indicator_style1 STYLE_SOLID

      #property indicator_type1  DRAW_LINE

      #property indicator_width1 1



//--- Global variable declarations



   // Indicator buffers

      double g_adbSpread[];   // Buffer for bar's spread



//--- Event handling functions



   // Initialisation event handler

      int OnInit(void)

      {

         IndicatorSetString( INDICATOR_SHORTNAME, MName );  // Set indicator name

         IndicatorSetInteger( INDICATOR_DIGITS, 0 );        // Set number of significant digits (precision)

         SetIndexBuffer( 0, g_adbSpread, INDICATOR_DATA );  // Set buffer for bar spread

         return INIT_SUCCEEDED;                             // Successful initialisation of indicator

      };



   // Calculation event handler

      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[]

         )

      {

         // Main loop   fill in the arrays with data values

            for( int i = prev_calculated < 1 ? 0 : prev_calculated - 1;

                     i < rates_total; i++ )

               g_adbSpread[ i ] = spread[ i ];  // Assign the spread value to the buffer

      

         // Return value of prev_calculated for next call

            return rates_total;

      };



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