Drawings

[Leeroy_Jenkins]

I have strategy with some WPF buttons on chart. One button is supposed to draw arrow on chart but as I understand correctly it's doesn't work bc Dispatcher.InvokeAsync method is working from OnStateChange.

Draw methods will not work if they are called from the OnStateChange() method.

So is there anyway to do drawing using buttons without using ShapDX?

[sbgtrading]

I have strategy with some WPF buttons on chart. One button is supposed to draw arrow on chart but as I understand correctly it's doesn't work bc Dispatcher.InvokeAsync method is working from OnStateChange.

I think you need to use this:
TriggerCustomEvent(o2 =>{ Draw.ArrowUp();},0,null);

[Leeroy_Jenkins]

I think you need to use this:
TriggerCustomEvent(o2 =>{ Draw.ArrowUp();},0,null);

With adding ForceRefresh() it works.
Thank you!

[NinjaTrader_ChelseaB]

Hello Leeroy_Jenkins,

sbgtrading is correct, any non-data-driven method that needs bar information (such as barAgo values for drawing objects attached to bars, or using series like the Close or Time series) must use TiggerCustomEvent() to first synchronize the series.

https://ninjatrader.com/support/helpGuides/nt8/triggercustomevent.htm

Also, below is a link to an example.

https://ninjatrader.com/support/forum/forum/ninjatrader-8/indicator-development/1126570-changing-variables-within-an-indicator-from-another-indicator-with-buttons?p=1126818#post1126818