problem to work with PlotIndexSetInteger function (MQL5)

[ahmadasadi1342103]

if(temp3 > 0)
        {
         PlotIndexSetInteger(0,PLOT_LINE_COLOR,plot_color[0]);
         Histogram_Buffer[i] = temp3;
        }
      else
         if(temp3 < 0)
           {
            PlotIndexSetInteger(0,PLOT_LINE_COLOR,plot_color[1]);
            Histogram_Buffer[i] = temp3;
           }

hi in the above code first PlotIndexSetInteger(0,PLOT_LINE_COLOR,plot_color[0]);
change the color of the plot indicator but second
PlotIndexSetInteger(0,PLOT_LINE_COLOR,plot_color[1]);
don't affect the color

I used "Draw_Histogram" type

Why?
tks for your help

[Vladimir Karputov]

ahmadasadi1342103 :

hi in the above code first PlotIndexSetInteger(0,PLOT_LINE_COLOR,plot_color[0]);
change the color of the plot indicator but second
PlotIndexSetInteger(0,PLOT_LINE_COLOR,plot_color[1]);
don't affect the color

I used "Draw_Histogram" type

Why?
tks for your help

You haven't shown all the code. Your piece cannot be compiled.

Check out the example from the help: DRAW_HISTOGRAM - The example shows how to work and this example works.

[ahmadasadi1342103]

Vladimir Karputov:

You haven't shown all the code. Your piece cannot be compiled.

Check out the example from the help: DRAW_HISTOGRAM - The example shows how to work and this example works.

//+------------------------------------------------------------------+
//|                                           asadi_MA_Histogram.mq5 |
//|                        Copyright 2021, MetaQuotes Software Corp. |
//|                                             https://www.mql5.com |
//+------------------------------------------------------------------+
#property copyright "Copyright 2021, MetaQuotes Software Corp."
#property link      "https://www.mql5.com"
#property version   "1.00"
#property indicator_separate_window
#property indicator_buffers 2
#property indicator_plots   2
//--- plot Histogram
#property indicator_label1  "Histogram"
#property indicator_type1   DRAW_HISTOGRAM
//#property indicator_color1  clrRed
#property indicator_style1  STYLE_SOLID
#property indicator_width1  1
//--- plot NONE
#property indicator_type2   DRAW_NONE

//--- input variables
input int PeriodMA = 7; // Period MA
input int MA_Period = 21;// Moving average period
input ENUM_MA_METHOD MethodMA = MODE_SMMA;
input ENUM_APPLIED_PRICE AppliedToMA = PRICE_MEDIAN;


//--- indicator buffers
double         Histogram_Buffer[];
double         Temp_Buffer[];

//--- MA Handle
int MA_Handle;

//--- Color
color colors[]={clrRed,clrBlue,clrGreen}; 


//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int OnInit()
  {
//--- indicator buffers mapping
   SetIndexBuffer(0,Histogram_Buffer,INDICATOR_DATA);
   SetIndexBuffer(1,Temp_Buffer,INDICATOR_DATA);

//--- Number of initial bars without drawing and values in the DataWindow
   PlotIndexSetInteger(0,PLOT_DRAW_BEGIN,(2*PeriodMA));
   PlotIndexSetInteger(1,PLOT_DRAW_BEGIN,(2*PeriodMA));

//--- Set digits
   IndicatorSetInteger(INDICATOR_DIGITS,_Digits);



//--- iMA
   MA_Handle = iMA(_Symbol,_Period,MA_Period,0,MethodMA,AppliedToMA);

//---
   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[])
  {

//--- check bars
   if(rates_total <= PeriodMA)
      return(0);

//---Reverse Array indexing
   ArraySetAsSeries(Histogram_Buffer,true);
   ArraySetAsSeries(Temp_Buffer,true);

//--- Array for local use here
   double Ave_MA_Local[];
   ArraySetAsSeries(Ave_MA_Local,true);

   int limit = rates_total - prev_calculated;

   if(limit == 0)
      limit = 1;

   if(prev_calculated == 0)
      limit = limit - PeriodMA;


//--- loop over bars to draw histogram
   for(int i=limit; i>=0; i--)
     {
      //--- calculate sum
      double sum = 0.0;
      CopyBuffer(MA_Handle,0,i,PeriodMA,Ave_MA_Local);

      for(int j=0; j<PeriodMA; j++)
         sum = sum + Ave_MA_Local[j];

      //--- fill buffer to draw histogram
      Temp_Buffer[i]  = sum / PeriodMA;
      double temp1 = Temp_Buffer[i] - (Temp_Buffer[i] - Temp_Buffer[i+1])*2;
      double temp2 = Temp_Buffer[i] + (Temp_Buffer[i] - temp1)*2;
      double temp3 = temp2 - temp1;
      if(temp3 > 0)
        {
         PlotIndexSetInteger(0,PLOT_LINE_COLOR,colors[0]);
         Histogram_Buffer[i] = temp3;
        }
      else
         if(temp3 < 0)
           {
            PlotIndexSetInteger(0,PLOT_LINE_COLOR,colors[1]);
            Histogram_Buffer[i] = temp3;
           }

     }
//--- return value of prev_calculated for next call
   return(rates_total);
  }
//+------------------------------------------------------------------+

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

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

Hi this is my code

i thought PlotIndexSetInteger function can change the bars of a histogram

so that 1 bar be red and the other be greean(for examole)

but its wrong, this function can change the color of all bars in a histogram together.

when this function runs all bars together changes color.

that's the point.

[Vladimir Karputov]

You need a different histogram:

• DRAW_COLOR_HISTOGRAM