Refering to a dataseries exposed by an indicator from a strategy

[tickling]

Hello,


I have a pretty complex indicator that:
- calculates and exposes several dataseries
- uses another indicator that calculates some other dataseries. That is done via assigning the indicator to a variable, and using that variable to access the dataseries.

All this is working fine for a long time.

Now I wanted to use all those in a strategy. So I tried the same way that appears on many posts and in the "indicator methods" section of the help. I assigned the indicator to a variable and tried to use its dataseries.

The strategy's OnBarUpdate needs those values only on bar# 24 and onwards. When it calls the indicator, its OnBarUpdate is called, yet the bar number inside it is 0 and it then gives error "..on bar 0 Object reference not set to an instance".

I tried calling it on every bar from the start.
I tried assigning it to a variable on each OnBarUpdate, or only once in OnStartup.
I tried accessing the dataseries directly using [] and without a variable.

All those did not change the behaviour.

What am I missing here ?

Thanks

[tickling]

OK problem solved

Just for reference perhaps someone encounters such a problem
The called indicator calculated and exposed a dataseries yet only for 255 bars
When the strategy used that dataseries, it on occasion tried to use more bars than that. This is why the indicator itself was working fine, yet when called by the strategy was giving problems

So the solution was to add to the indicator MaximumBarsLookback setting
I hope this is helpful for someone

[NinjaTrader_JC]

Hello tickling,

Thanks for posting the resolution for others!