Detect Chart Interval Change From Add-On

[aslane]

I would like to detect an interval change for a chart from an AddOn. I can almost do it by hooking the toolbar interval selector IntervalChanged event. This works when the interval selector is used to change the interval, but fails when the keyboard is used to change the interval.

Is there a way to do this today? I was not able to find anything.

I do this for an instrument change today by hooking the toolbar instrumentSelector StringValueChanged event, which properly raises an event when with the selector or the keyboard are used.

Can something similar be added to the interval selector? Or can the interval changed event be raised when the interval is changed via the keyboard?

Thanks for the consideration.

[NinjaTrader_ChelseaB]

Hello aslane,

This would be undocumented and out of the realm of NinjaTrader Support.

I'm uncertain that there is an event accessible from an addon that would trigger when a chart's data series changes..
I'll look around and see if I can find anything helpful.

This thread will also remain open for any community members that would like to assist.

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[aslane]

Its ok if it is not available, then run it by development quick. This is a trivial add for those that understand it. As I mentioned, your custom instrument selector already provides the means, and the custom interval selector provides half of the solution. The interval selector just needs to be extended one of several ways to handle the keyboard update.

I can make this work, but really wanted to do it correctly vs hacking something in there.

[NinjaTrader_ChelseaB]

Hello aslane,

So far I've been advised that if you use window linking to link your addon window to the chart, you can detect the data series change from the addon if its using an NTTabPage using the setter of the BarsPeriod object.

Below is a public link to the help guide on Window Linking.

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

[aslane]

Of course an AddOn may not have a window, but instead monitor windows, in which case you need a way to monitor when the interval changes.

[MarkWise]

I know this an old post but to help others, we use code similar to the following:

object item = _chartWindow.FindFirst("instrumentSelector");
if (item != null)
{
    _instrumentSelector = item as InstrumentSelector;
    _instrumentSelector.StringValueChanged += InstrumentSelector_StringValueChanged;
    Print("FOUND");
}
else
{
    Print("NOT FOUND");
}

Be sure to unhook the event when you're finished with it.