Appropriate times are communicated to NinjaTrader via

-> the session template
-> or the indicator settings

Either you use a specific session template for each instrument which divides the trading day into three sections (night session, regular session and evening session) or you need to set the times manually via the indicator dialogue box.

If you want it automated, you would need to

(1) generate the session templates for the instruments that you trade

details on those session templates can be found here :

Correct Sessions for Your Charts I have been asked several times to put this information into a thread in a condensed form along with the class of indicators that I have coded for sessions. So here it comes. The idea is to explain, why it is useful to use sessions, how to set up the …

and (2) apply the SessionColors indicator to your chart

the indicator can be found here:

Download: SessionColors Exported using NT 7.0.1000.1 This is a simple indicator that colors the background of your charts according to the current session template. To use the indicator you first need to create a session template that reflects the different intraday … personFat Tails