understanding steps in strategy analyzer

[YD777]

When I run strategy analyzer with a Print(Time[0]) in OnBarUpdate, I notice it doesn't start printing to the screen until about 5 minutes into the strategy analyzer. What is occurring in that 5 minutes?

I ask because sometimes my strategy analyzer gives me an error in the log that says "Error on calling 'OnBarUpdate' method on bar 1696"; But the error occurs BEFORE anything prints from my Print(Time[0]) statement. How can that be? I'd expect to have 1695 Print statements executed before getting an error on bar 1696.

[NinjaTrader_Jim]

Hello YD777,

Thanks for opening the thread.

The prints should occur as OnBarUpdate() is being iterated in the Strategy Analyzer.

It could be that you are loading a large amount of data before the Strategy Analyzer begins calling OnBarUpdate(). I would suggest to test with a smaller period of time to see if your prints still take as long to show up in the output window.

I have attached a very simple strategy that prints to the output window and does some very simple trades. I tested this with a Time frame from January 1 2017 to May 31st 2017. I observed that the prints did not occur when data was loading, but were printing while the Strategy Analyzer was reporting "Running backtest on ES 06-17 ..."

I've created a video demonstrating as well: https://www.screencast.com/t/kFV2Iipj

Please let me know if I may be of further assistance.