Error on calling 'OnBarUpdate' method for indicator on bar n: index out of bounds

[stefanodp]

Hi,
I'm developing an Indicator within call other indicators. When I use some kind of indicator as the Vitalij's Volume Indicator I receive the error message:

Error on calling 'OnBarUpdate' method for indicator on bar n: index out of matrix's bounds

In the attachment there is my custom indicator (simplified for debugging) and the Vitalij's Volume Indicator.
To solve the problem I tried to put some ifs in the OnBarUpdate() method like

if(CurrentBar > vitVolume.BarsRequired){...}

or

if(CurrentBar < 0){...}

as suggested in other posts. Nevertheless, it doesn't work.

Please, can you help me to resolve the problem?
Best
Stefano

P.s. I'm using the indicator with MarketReplay.

[NinjaTrader_AlanP]

Hello stefanodp,

Thank you for your note.

I'm unable to test the script as I'm missing methods needed in VitVolume indicator. It looks like you are creating an indicator instance vitVolume, never setting it, then trying to print its values.

Below would be an example of the correct format in NT7 for referencing another indicator via an indicator.

Under OnBarUpdate,

if(CurrentBar<30) return;
Print("MACD"+MACD(5, 10, 20).Avg[0].ToString());

In order to access the values in the VitVolume, VitVolume should set plots and its these plots which are accessible. You could see the MACD indicator or SMA for how this is done.

If VItVolume does not set plots you could see the following reference example,

https://ninjatrader.com/support/forum/showthread.php?t=4991

If you use this format, does this resolve the issue?

I look forward to your reply.

[stefanodp]

Thank you for reply.

The VitVolume sets the Plots, as follow

Add(new Plot(new Pen(Color.FromArgb(64, 64, 64), 2), PlotStyle.Bar, "UnknownAsk"));
Add(new Plot(new Pen(Color.FromArgb(64, 64, 64), 2), PlotStyle.Bar, "UnknownBid"));
Add(new Plot(new Pen(Color.Green, 2), PlotStyle.Bar, "AtAsk"));
...

in a similar way to MACD.
The indicator itself works fine. Why am I unable to get the values stored in Values[0], Values[1] and so on? That's weird.

[NinjaTrader_AlanP]

Hello stefanodp,

Have you attempted to print the indicator values using something similar to the following?

Print("VitVolume "+VitVolume().UnknownAsk[0].ToString());

I look forward to your reply.

[stefanodp]

Thank you.

The problem was that it didn't recognize it as Indicator, only as Type. I created a new Indicator with the wizard and copied/pasted the code. Now it works.