ClearOutputWindow() in backtest

[tamas]

Hello,

am i see correctly if i use ClearOutputWindow() method in OnBarUpdate() /see below/, then that will not run in backtest mode?

protectedoverridevoid OnBarUpdate()
{
Print("OnBarUpdate");
ClearOutputWindow();
...
}

thanks in advance,

[NinjaTrader_JoshP]

Not sure what you mean. Using ClearOutputWindow() clears the window whenever your code reaches it. Your current code means clear it every time you update your bars. Bars do update in backtests. That is how your strategy can process the historical bars.

[tamas]

Not sure what you mean. ...

Sorry, probably i was misunderstandable ...

If i use sample in strategy at simulation mode and when OnBarUpdate method is called, then text "OnBarUpdate" will be written to the outputwindow and after this the window will be clear.

If i use sample in strategy at backtest and when OnBarUpdate method is called, then text will be written to the outputwindow and after this the window will not be clear. The result after the backtest in window:
OnBarUpdate
OnBarUpdate
OnBarUpdate
OnBarUpdate
etc.

So the question: am i see correctly that ClearOutputWindow() method will not run in backtest mode?

[NinjaTrader_Austin]

tamas, I ran a few quick tests and I believe that ClearOutputWindow(), when called from a backtest, will only clear the Print()s from the current backtest.

Reasoning:
I created a strategy that printed two lines of text on bar 100.
I ran the test once, and the two lines of text popped up, as expected.
Then, I added a ClearOutputWindow() line to follow the two print statements and ran the test again. Nothing appeared in the output window, but the two first lines still remained.
Then I deleted the clear line and ran it again, and two more lines popped up.
Then I added the clear line again and ran it, but there were still four lines of text after the test ran again.

[tamas]

tamas, I ran a few quick tests and I believe that ClearOutputWindow(), when called from a backtest, will only clear the Print()s from the current backtest.

Reasoning:
...

Hello Austin,

thanks the detailed answer! I think, what you wrote would work if your code is in Initialize() method and not in OnBarUpdate() method. To be more ubderstandable i attached sample and scrrenshot about the result. From this reason i think that ClearOutputWindow() method in OnBarUpdate() will not run strategy during backtest. Is this true?

(This could be a logical solution, because all printing values (in backtest mode) will be seen after run. So i only would like to get confirmation about this.)

Thank you,

[NinjaTrader_Austin]

Tamas, from our independent tests, I would say that it is clear that ClearOutputWindow() inside OnBarUpdate() does not fire during a backtest.

[tamas]

Tamas, from our independent tests, I would say that it is clear that ClearOutputWindow() inside OnBarUpdate() does not fire during a backtest.

Thank you Austin,

Happy Holidays for you and the support team.

[NinjaTrader_Austin]

No problem, Tamas. Enjoy your holidays as well.