State.Terminated called multiple times

[algunion]

Hello,

My indicator logic is changing the

ChartControl.Properties.ChartBackground

and I want to change it back to the initial value when the indicator is removed.

I'm trying to make use of

State.Terminated

but I encounter some issues.

Firstly, the

State.Terminated

is called multiple times (even after OK/Apply click). This is strange given the definition stated in the documentation.

I am not bothered by the fact that ChartControl is null for some calls (it is not null for all calls).

The problem is that

State.Terminated

is happening multiple times and not just at the removing part.

Is there another way to reset the

ChartControl.Properties.ChartBackground

to the initial value?

Thanks.

[NinjaTrader_Jim]

Hello algunion,

Welcome to the forums!

NinjaScripts will be cloned twice when the Indicators menu is brought up. The first time is to list the indicators and the second time is to populate the properties grid with the properties of the selected indicator. State.SetDefault and State.Terminated are passed in these clone events.

I may suggest making your changes to ChartControl.Properties.ChartBackground after State.DataLoaded has been reached, and then to keep track of the last state that was passed. This way, if OnStateChange() reaches State.Terminated after an Active state is reached, we know the State.Terminated is occurring on the removal of the indicator.

As a loose example:

else if (State == State.Terminated)
{
	if(lastState == State.Realtime || lastState == State.Historical || lastState == State.DataLoaded)
		Print("Removed.");
}

Publicly available information on the NinjaScript LifeCycle can be referenced here -

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

Please let us know if we may be of further assistance.

[algunion]

It works

Thank you, Jim.

This works. Just confirming in case someone else is searching the issue.