Syncronizing between many instruments

[freewind]

Hi All,

I'm working on a strategy that load many instruments(~100) and do some checking to enter a position on bar close in OnBarUpdate().
I want to do the check only once so I have:

 if (BarsInProgress != 0)
                return;

I know that NT is event driven so my issue is what happens if some of the instruments trades less frequent then the BarInProgress == 0 or vice versa, what data I'm referring to in the call for OnBarUpdate() when I'm using for example Closes[50][0]?

I hope I made my question clear :-)
Tx in advance!

[NinjaTrader_Bertrand]

freewind, you're correct NT would be event driven - if you call Closes[50[0] on BIP1 context this would give you the last known value of the Close from this series, the last time it called the OnBarUpdate().

[freewind]

OK, and when I'm backtesting can I assume I get the data of the current bars for all of my instruments?

[NinjaTrader_Bertrand]

Correct, the [0] index would point towards the last known value of the array's context you're working with.