Stop Drawing using OnMarketData

[Itachi]

I have an indicator that draws a rectangle on meeting a condition using OnBarUpdate. Instead of waiting for the bar to close, I tried using the OnMarketData to initiate the drawing as soon as price met my condition but the bar had not yet closed.

The OnBarUpdate will successfully draw the rectangle after the bar has closed so this is working as expected.

The OnMarketData, which is much different from the OnMarketUpdate does begin drawing the rectangle as expected, but continues modifying the the rectangle after the bar closed.

[NinjaTrader_Gaby]

Hello Itachi,

Thank you for your post.

Are you using unique tag names to draw a new rectangle each time , or are you reusing the tag name to update an existing drawing object?

To give a drawing object a unique tag name, please see the forum post linked below:

https://forum.ninjatrader.com/forum/ninjatrader-8/strategy-development/109349-strategy-buy-sell-signal-on-chart?p=838630#post838630

Please let me know if I can assist further.

[Itachi]

I'm using text+CurrentBar

[NinjaTrader_Gaby]

Hello,

What are the conditions you are using to call the draw method?

Please see the attached script demonstrating drawing in OnMarketData(). Using a unique tag name, the drawing object is not updated after it has been created.

[Itachi]

Pick any condition you like. Would I would like to happen is when the condition is met in OnMarketData it draws a rectangle and continues to update the rectangle size. When the bar closes I would like the rectangle to stop updating

ex OnMarketData: if (maketDataUpdate.last > Close[1] ) Draw/update rectangle

ex OnBarUpdate: if(Close[0] > Close[1]) Draw final rectangle

[NinjaTrader_Gaby]

Hello,

We suggest using a bool. In OnMarketUpdate(), require the bool to be true and in OnBarUpdate(), set the bool to false based on your condition to stop updating the drawing.

See the attached sample script below, which moves a rectangle up until the bar closes.

Please note this script is using Calculate.OnPriceChange, so OnBarUpdate() also checks if IsFirstTickOfBar is true to make sure this happens once per bar.

If you have any questions, please let us know.