Days of the week color - indicador para MetaTrader 5

A modificação do código Days of the week é que agora para cada dia da semana é exibida uma cor diferente:

Para o estilo DRAW_COLOR_HISTOGRAM, são necessários dois buffers (buffer de valores HistogramBuffer e buffer de cor HistogramColors):

//+------------------------------------------------------------------+
//|                                       Days of the week color.mq5 |
//|                              Copyright © 2018, Vladimir Karputov |
//|                                           http://wmua.ru/slesar/ |
//+------------------------------------------------------------------+
#property copyright "Copyright © 2018, Vladimir Karputov"
#property link      "http://wmua.ru/slesar/"
#property version   "1.000"
#property indicator_separate_window
#property description "Days of the week in the form of a color histogram"

#property indicator_separate_window 
#property indicator_buffers 2 
#property indicator_plots   1 
//--- plot Histogram 
#property indicator_label1  "Day colors" 
#property indicator_type1   DRAW_COLOR_HISTOGRAM
//--- define 8 colors for coloring sections
#property indicator_color1  clrCyan,clrRed,clrYellowGreen,clrBlue,clrYellow,clrNavy,clrGold,clrMediumSeaGreen
#property indicator_style1  STYLE_SOLID 
#property indicator_width1  2
//--- indicator buffers 
double         HistogramBuffer[];
double         HistogramColors[];
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+

As cores são especificadas na linha

//--- define 8 colors for coloring sections
#property indicator_color1  clrCyan,clrRed,clrYellowGreen,clrBlue,clrYellow,clrNavy,clrGold,clrMediumSeaGreen

e a cor clrCyan tem índice "0", a cor clrRed tem índice "1" e assim por diante.

O gerenciamento de cores do histograma é realizado atribuindo a cada índice de buffer HistogramColors seu índice de cor:

switch(STime.day_of_week)
        {
         case  0:
            HistogramBuffer[i]=0;
            HistogramColors[i]=0;
            break;
         case  1:
            HistogramBuffer[i]=1;
            HistogramColors[i]=1;
            break;
         case  2:
            HistogramBuffer[i]=2;
            HistogramColors[i]=2;
            break;
         case  3:
            HistogramBuffer[i]=3;
            HistogramColors[i]=3;
            break;
         case  4:
            HistogramBuffer[i]=4;
            HistogramColors[i]=4;
            break;
         case  5:
            HistogramBuffer[i]=5;
            HistogramColors[i]=5;
            break;
         case  6:
            HistogramBuffer[i]=6;
            HistogramColors[i]=6;
            break;
        }