RemoveDrawObject() in Historical Backtesting

[conanmishler]

Does RemoveDrawObject() work in Historical Backtesting? I can't seem to get it to work in my strategy. Here's my strategy code:

        protected override void OnBarUpdate()
        {
            //Add your custom strategy logic here.
            if (CurrentBar == 30)
            {
                Draw.ExtendedLine(this, "RedLine", true, 20, High[20], 10, High[10], Brushes.Red, DashStyleHelper.Solid, 2);
                Draw.ExtendedLine(this, "BlueLine", true, 20, Low[20], 10, Low[10], Brushes.Blue, DashStyleHelper.Solid, 2);
            }

            if (CurrentBar == 35)
                RemoveDrawObject("BlueLine");
        }

It draws a red line and a blue line, then attempts to remove the blue line, but fails to remove it from the chart in Historical Backtesting.
Note, I've tested this code within an Indicator and in that context the blue line is removed just fine. I image this strategy code would also work fine in Realtime, but I'm interested in getting it to work in Historical backtesting.

Any ideas?

Thanks in advance.

[NinjaTrader_ChelseaB]

Hello conanmishler,

I've added the code to a test script and the blue line is being removed in historical data without any issue.

https://drive.google.com/file/d/1A9w-QdgtMLfKjqJf2OxRn7lmyGR3fwin/view?usp=drivesdk

[conanmishler]

Hi ChelseaB,

Thanks for the quick reply!

What you did in your video example was to add my code to an Indicator and then test it within that Indicator. I don't know if you had a chance to read all of the text in my original post, but it included this:

I can't seem to get it to work in my strategy. [...] Note, I've tested this code within an Indicator and in that context the blue line is removed just fine. I image this strategy code would also work fine in Realtime, but I'm interested in getting it to work in Historical backtesting.

Maybe I should've been more specific in saying that it works fine in Historical data when it is part of an Indicator, but not when it is part of a Strategy.

Looking forward to your response.

[NinjaTrader_ChelseaB]

Hello conanmishler,

I overlooked that.

Retested and re-exported as a strategy.

https://drive.google.com/file/d/1Ebv05F1aIKW3pWBQ6GbJjNnSlSARM1Ua/view?usp=drivesdk

[conanmishler]

Hello again Chelsea,

I'm so glad you post those videos of what you're doing so I can see where it differs from what I'm doing.

From your most recent video, I learned that RemoveDrawObject() does indeed work on Historical Data when used in a strategy. I was able to duplicate what you did in your video and thereby confirm this. However, what I've been doing is using the strategy I posted in Strategy Analyzer Backtesting, not adding the strategy to a historical chart. If you try running your "RemoveDrawObjectTest" in a Strategy Analyzer Backtest, then open up the chart window of the Strategy Analyzer, I think you'll find that the blue line is not removed as it should be.

Thanks so much for looking into this.

[NinjaTrader_Jesse]

Hello conanmishler,

In regard to RemoveDrawObject in the analyzer, I do see we have a tracked issue for that: 13696

You can track this in the change log here in future updates: https://ninjatrader.com/support/help...ease_notes.htm

For the time you would be able to use RemoveDrawObject historically however not in the analyzer until this has been changed.

I look forward to being of further assistance.

[conanmishler]

Thanks for the Info., Jesse. It's good to know this issue is being tracked and worked on.