Use DRAW_COLOR_LINE and DRAW_COLOR_HISTOGRAM together - page 2

[LukeB]

Alain Verleyen:

Are you ever listening the answers ?

Plot indexed 2 to 6 DOESN'T EXIST.

Thanks for the clarification...  I actually thought I was reading and studying the answers, trying to make them line up with the MQL5 Reference "Connection between Indicator Properties and Corresponding Functions" topic.  I now see where you have illustrated "PlotIndexSet...(1,..." where I had it as 2, and that does line up with the reference's statement:
     "numeration of levels and plots in preprocessor terms starts with one, while numeration of the same properties at using functions starts with zero, i.e. the indicated value must be by 1 less than that indicated for #property."
which I recognize as the same as was in MQ4.

I see the assertion that the PlotIndex... argument "plotting style index"  is not the same as the SetIndexBuffer argument "buffer index" and I have just been 'lucky' at setting colors and widths, I guess.

This leaves me wondering though, for example if I wanted to set Index Buffer 5's empty value to -1, it appears this will not work:

SetIndexBuffer(5,g_calcOne,INDICATOR_CALCULATIONS);
      PlotIndexSetDouble(5,PLOT_EMPTY_VALUE,-0.1); //(Not a direct replacement for MQ4's SetIndexEmptyValue ?)

This will be a relatively easy experiment.

[Alain Verleyen]

LukeB:

Thanks for the clarification...  I actually thought I was reading and studying the answers, trying to make them line up with the MQL5 Reference "Connection between Indicator Properties and Corresponding Functions" topic.  I now see where you have illustrated "PlotIndexSet...(1,..." where I had it as 2, and that does line up with the reference's statement:
     "numeration of levels and plots in preprocessor terms starts with one, while numeration of the same properties at using functions starts with zero, i.e. the indicated value must be by 1 less than that indicated for #property."
which I recognize as the same as was in MQ4.

I see the assertion that the PlotIndex... argument "plotting style index"  is not the same as the SetIndexBuffer argument "buffer index" and I have just been 'lucky' at setting colors and widths, I guess.

This leaves me wondering though, for example if I wanted to set Index Buffer 5's empty value to -1, it appears this will not work:

SetIndexBuffer(5,g_calcOne,INDICATOR_CALCULATIONS);
      PlotIndexSetDouble(5,PLOT_EMPTY_VALUE,-0.1); //(Not a direct replacement for MQ4's SetIndexEmptyValue ?)

This will be a relatively easy experiment.

There is no sense to set a plot empty value when there is not plot.

[LukeB]

Alain Verleyen:

There is no sense to set a plot empty value when there is not plot.

But, I have looked for values not the empty value in MQ4 worlds equivalent of "INDICATOR_CALCULATIONS".
I had referred to:
    https://www.mql5.com/en/articles/81
and found this listed as equivalence:
   MQL4: void SetIndexEmptyValue(int index, double value)
   MQL5:  bool PlotIndexSetDouble(index,PLOT_EMPTY_VALUE,value)
Which appears to be not true, as I inserted this which displayed 0.0000 (For Any Value N):

// in OnInit
PlotIndexSetDouble( N ,PLOT_EMPTY_VALUE, 27.0); // For Any Value N
.....
   // followed by this in OnCalculate:
   static datetime lastBarZeroTime=NULL;
   static int callCount=0; callCount++;
   datetime barZeroTime=iTime(_Symbol,PERIOD_CURRENT,0);
   if (barZeroTime != lastBarZeroTime)
    {
      Comment("CalcOne Empty Value: "+DoubleToString(g_calcOne[0],_Digits)+" : "+IntegerToString(callCount));
      lastBarZeroTime = barZeroTime;
    }