Not to remove horizontal line when strategy enabled

[asmmbillah]

Hi, I am using Draw.HorizontalLine(); for drawing horizontal lines in my strategy. after the strategy is disabled, these lines stays on the chart which is ok. But when I re-enable the strategy those lines gets removed. Is there anyway to keep those drawn lines from being removed when I re-enable the strategy?

[NinjaTrader_ChrisL]

Hello asmmbillah, thanks for your post.

When a strategy instance draws any drawing tool and the strategy is disabled the drawing tool will be removed. If you need to preserve the levels of the horizontal line you will need to re-draw it at some point in the historical data, or at the first real time bar. This could be done by writing the lines data to a .txt file then reading that .txt file to re-populate the lines. We have an example here demonstrating file IO from a script:

https://ninjatrader.com/support/help..._propertie.htm

Alternatively, you can draw the horizontal lines manually then access their data from the DrawObjects array. See the documentation here:
https://ninjatrader.com/support/help...rawobjects.htm

Please let me know if you have any questions on this material.

[asmmbillah]

thanks, but when my strategy is in state.Terminated state, it does not remove the line which is what I wanted; but that kind of contradicts from what you said above. I just wanted to keep that drawing as it is on the chart when I re-enable the strategy. When it goes through initial states, what what point it actually gets removed?

[NinjaTrader_ChrisL]

Hello asmmbillah, thanks for your reply.

In my test script (attached) the line is removed after State.Terminated. It will draw a line on the first real time bar, so test on a 10 second chart and wait for the first real time bar. You may test this out on your end, the line should get removed after the strategy is terminated.

Please let me know if I can assist any further.

[asmmbillah]

Thanks. I should have explained it. I have added some to your script. on next bar it will enter long and onexecutionupdate it will draw the line and terminate. you will see the line remains on the chart. I hope that should clarify. However as said, when I re-enable it, line gets removed. I just want to keep it when I re-enable it. thanks in advance.

[NinjaTrader_ChrisL]

Hello asmmbillah, thanks for your reply.

In my test the line is removed when the strategy is disabled. If you need to line to persist after the strategy is re-enabled, it must be handled through code. The line value will need to be saved to a .txt file and re-drawn if needed.

https://clauber.tinytake.com/tt/NTA5NzUyOV8xNjAwMzY0MQ

Best regards.