cumulative index

[NinjaTrader_Bertrand]

Great, it starts at 0 but populates as you set your calculations Kay (the first calculated value). You could reset it on session break for example -

http://www.ninjatrader-support.com/HelpGuideV6/SessionBreak.html

[kaywai]

using the SessionBreak will reset it every session, no?

I would rather it just start at zero from whenever my data starts. is that possible?

[NinjaTrader_Bertrand]

Correct, with Session Break you could reset it if a new session starts.

I'm not sure I follow, it does start at 0, but what you see is the result of your first calculation done as the OnBarUpdate() is called after 2 bars for your indicator, perhaps you would need to debug your calculation logic then to adjust as needed.

When you want to calculate on realtime data only, put this at the OnBarUpdate() start -

if (Historical) return;

[kaywai]

Cool. Thanks Bertrand!