DataSeries on a secondary data series

[JoshDance]

I am not sure that I am correctly initializing my DataSeries which I want to sync with my secondary data series. In Initialize() I'm doing:

Add(PeriodType.Minute,1);

And in OnBarUpdate() I'm doing this just to see if I'm on the right track (and I'm not):

if (cumVol == null && BarsInProgress == 1)
	cumVol = new DataSeries(this, MaximumBarsLookBack.Infinite);
		
if (cumVol != null && BarsInProgress == 1 && cumVol.ContainsValue(0))
	Print("dataseries for bar " + CurrentBar + " is " + cumVol[0]);

However I get the error:

Error on calling 'OnBarUpdate' method for indicator 'RelativeVolume' on bar 0: You are accessing an index with a value that is invalid since its out of range. I.E. accessing a series [barsAgo] with a value of 5 when there are only 4 bars on the chart.

I looked at the thread:

http://www.ninjatrader.com/support/forum/showthread.php?t=3572

But it showed the example of initializing the secondary DataSeries with an indicator, and I am wanting to manually fill in the values. I suspect my initialization is incorrect, but I don't have any other reference to go by.

[NinjaTrader_Bertrand]

JoshDance, please go alongside the example provided for the sync - it would need to be an indicator as it implements an IDataSeries interface so you can provide the BarsArray to sync to.

[JoshDance]

JoshDance, please go alongside the example provided for the sync - it would need to be an indicator as it implements an IDataSeries interface so you can provide the BarsArray to sync to.

And then do I manually go through the DataSeries when the indicator loads and in each OnBarUpdate() I can set my own values?

[NinjaTrader_Bertrand]

Correct, you can set your own values then in the correct BIP. What we discussed is just the initial sync.

[JoshDance]

Correct, you can set your own values then in the correct BIP. What we discussed is just the initial sync.

Thanks Bertrand, got it working and indicator finished. Thanks for your help!