Error: Index was outside the bounds of the array

[gubbar924]

Hello all, new to programming, so please excuse any dumb questions ...

I have put together an oscillator which compiled and is running just fine. On this oscillator, I have added 2 sets of lines, 1 set to mark the overbought/oversold areas, the other set to mark warning lines. The only issue I've seen so far is that indicator goes blank if I change the boolean (to show/hide overbought/oversold lines) to false from the indicators popup screen. I have another boolean that is setup the exact same way (toggles show/hide the warning lines) but it does not give any issues if I set it to false.

the output window says

Failed to call method 'Initialize' for indicator '': Index was outside the bounds of the array.

I have 2 sets of plots, set 1 is overbought and oversold plots, set 2 is bullish warning and bearish warning plots. They are set up as plots and not lines.

Here is the code I use for that in the initialize section

            if (ShowOBLines==true)
            {
            Add(new Plot(Color.FromKnownColor(KnownColor.Red), PlotStyle.Line, "BullsExtended"));
            Plots[10].Pen.DashStyle = DashStyle.Dash;
            Add(new Plot(Color.FromKnownColor(KnownColor.Green), PlotStyle.Line, "BearsExtended"));
            Plots[11].Pen.DashStyle = DashStyle.Dash;
            }
            
            if (ShowWarningLines==true)
            {
            Add(new Plot(Color.FromKnownColor(KnownColor.Black), PlotStyle.Line, "BullsWarning"));
            Plots[12].Pen.DashStyle = DashStyle.Dash;
            Add(new Plot(Color.FromKnownColor(KnownColor.Black), PlotStyle.Line, "BearsWarning"));
            Plots[13].Pen.DashStyle = DashStyle.Dash;
            }

then in the OnBarUpdate section, this is what I have coded

            if (ShowOBLines==true)
            {
                BullsExtended.Set(OverBought);
                BearsExtended.Set(OverSold);
            }
            
            if (ShowWarningLines==true)
            {
                BullsWarning.Set(BullWarning);
                BearsWarning.Set(BearWarning);
            }

and finally, in the Properties section, this is what I have

        [Browsable(false)]    // this line prevents the data series from being displayed in the indicator properties dialog, do not remove
        [XmlIgnore()]        // this line ensures that the indicator can be saved/recovered as part of a chart template, do not remove
        public DataSeries BullsExtended
        {
            get { return Values[10]; }
        }
        
        [Browsable(false)]    // this line prevents the data series from being displayed in the indicator properties dialog, do not remove
        [XmlIgnore()]        // this line ensures that the indicator can be saved/recovered as part of a chart template, do not remove
        public DataSeries BearsExtended
        {
            get { return Values[11]; }
        }
        
                [Browsable(false)]    // this line prevents the data series from being displayed in the indicator properties dialog, do not remove
        [XmlIgnore()]        // this line ensures that the indicator can be saved/recovered as part of a chart template, do not remove
        public DataSeries BullsWarning
        {
            get { return Values[12]; }
        }
        
        [Browsable(false)]    // this line prevents the data series from being displayed in the indicator properties dialog, do not remove
        [XmlIgnore()]        // this line ensures that the indicator can be saved/recovered as part of a chart template, do not remove
        public DataSeries BearsWarning
        {
            get { return Values[13]; }
        }

when ShowOBLines is set to false, the indicator goes blank, but ShowWarningLines works just fine when toggled true/false. My guess is that setting ShowOBLines to false messes up the array of dataseries as the BullsExtended and BearsExtended dataseries are not at the end of the array, but I do not understand enough to know what to do about it.

any ideas? Thank you!

[NinjaTrader_Bertrand]

gubbar924, correct - the issue very likely comes from changing the Values array needed with that conditional entry. I would leave all plots eventually needed defined and then just set values conditionally. That will have visually the same effect for you, as the Plot definitions in Initialize() will just define how those set values are displayed.

[gubbar924]

Hi Bertrand, thanks for the tip, but I'm entirely sure I follow what you meant. Is there a way to dynamically change the look/feel of a plot?

I tried this as well, but the lines did not disappear

            if (ShowOBLines==true)
                {
                Add(new Plot(Color.FromKnownColor(KnownColor.Red), PlotStyle.Line, "BullsExtended"));
                Add(new Plot(Color.FromKnownColor(KnownColor.Green), PlotStyle.Line, "BearsExtended"));
                }
            else
                {
                Add(new Plot(Color.FromKnownColor(KnownColor.Transparent), PlotStyle.Line, "BullsExtended"));
                Add(new Plot(Color.FromKnownColor(KnownColor.Transparent), PlotStyle.Line, "BearsExtended"));
                }
                
                Plots[10].Pen.DashStyle = DashStyle.Dash;
                Plots[11].Pen.DashStyle = DashStyle.Dash;
            
            if (ShowWarningLines==true)
                {
                Add(new Plot(Color.FromKnownColor(KnownColor.Black), PlotStyle.Line, "BullsWarning"));
                Add(new Plot(Color.FromKnownColor(KnownColor.Black), PlotStyle.Line, "BearsWarning"));
                }
            else
                {
                Add(new Plot(Color.FromKnownColor(KnownColor.Transparent), PlotStyle.Line, "BullsWarning"));
                Add(new Plot(Color.FromKnownColor(KnownColor.Transparent), PlotStyle.Line, "BearsWarning"));
                }
            
            Plots[12].Pen.DashStyle = DashStyle.Dash;
            Plots[13].Pen.DashStyle = DashStyle.Dash;

in hindsight I see how that would not change anything
do you have any suggestions as to how I can dynamically change the visibility of these plots?

[NinjaTrader_Bertrand]

gubbar924, I would make the conditional logic then to change the colors to OnStartUp instead. Just define all your plots with the default color for example in Initialize() and then change later.

protected override void OnStartUp()
{

   if (your condition)
      Plots[x].Pen.Color = Color.Transparent;

}

[gubbar924]

so thats how its done, thank you!

[gubbar924]

got it working now, thank you for your help!