Series<T> object is inaccessible OnRender

[afshinmoshrefi]

I have several Series objects holding data per bar. I need the information in the Series to render the indicator. The Series objects are populated inside OnBarUpdate, when I try to access them inside OnRender, null is returned. How can I access Series objects inside OnRender?

[NinjaTrader_ChelseaB]

Hello afshinmoshrefi,

May I confirm you are using .GetValueAt() with these series?

https://ninjatrader.com/support/helpGuides/nt8/en-us/getvalueat.htm

Or may I confirm this is being run in the call back method of TriggerCustomEvent()?

https://ninjatrader.com/support/helpGuides/nt8/en-us/triggercustomevent.htm

See note 8 in the first Notes box in OnRender()

https://ninjatrader.com/support/helpGuides/nt8/en-us/onrender.htm

See the 3rd Notes box in Series<T>.

https://ninjatrader.com/support/helpGuides/nt8/en-us/seriest.htm

[afshinmoshrefi]

I am not using GetValueAt(). I was trying to use it simply like other price series. What is the function of GetValueAt() vs just checking mySeries[i] ?

[NinjaTrader_ChelseaB]

Hello afshinmoshrefi

OnRender() updates in a different thread than the price series. The price series will not be in sync with OnRender.

Do you feel the 3rd Note box in the Series<T> help guide page is not adequate?
"Note: The "barsAgo" value is only guaranteed to be in sync with the recent current bar during core data event methods, such as OnBarUpdate(), OnMarketUpdate(), and during strategy related order events such as OnOrderUpdate(), OnExecutionUpdate(), OnPositionUpdate(). For scenarios where you may need to set a value outside of a core data/order event, such as OnRender() or a custom event, you must first synchronize the "barsAgo" pointer via the TriggerCustomEvent() method."

How do you feel this could be changed so that it is easier to digest?