referenced Indicator and fresh values

[ttodua]

hi, lets say I use:

if( State== State.DataLoaded){

kn = Keltner(12);
}


OnBarUpdate(){
kn.Update();
if (kn.Upper... > ...)

}


should we call "Update()" on included indicator instances, to get the fresh values at first?
( because, as i see many NT indicators, doesnt expose dataseries with "Update()", like this:


public Series<double> Upper
{
//Update(); //< -- - this is missing from NT built-in indicators, that's why i thought we should call it manually in our indis while calling NT indis
get upper;
}

[NinjaTrader_Jim]

Hello TazoTodua,

Thanks for opening the thread.

When creating a Series<T> we sync it to the the underlying data series that the indicator is running off of with new Series<T>(this); Since the data series that the indicator runs on must be supplied by the hosting NinjaScript, these types should be current.

When using public variables of different types, these are not synchronized to the data series, so they may not be current. This is when calling Update() would be advised.

This is noted in the NT7 DataSeries documentation page, and I've requested to have this noted in the NT8 Series<T> documentation page.

NT7 DataSeries - https://ninjatrader.com/support/help...ries_class.htm

NT8 Series<T> - https://ninjatrader.com/support/help...s/?seriest.htm

Please let us know if you have any additional questions.

[ttodua]

thanks!
so, can you tell me the example i.e. for ketlen channel (or any indi),
How should I call those (Series<> public exposed variables of KeltnerChannels, like "Upper" series)

we should add the instance in DataLoaded state or Configure? and when to Update() ?

are there examples for Series and for different types (not **this** synced).

[NinjaTrader_Jim]

Hello TazoTodua,

If you are calling the indicator, you can use the following syntax:

KeltnerChannel(Close, 1.5, 10).Upper[0]

If you are adding an instance of an indicator to the NinjaScript, you can use the syntax below:

MyKeltnerChannel.Upper[0]

As a tip, the Strategy Builder can be used to create condition that checks this plot, and then clicking View Code will show the generated syntax. You can use this to see how the Strategy Builder creates instances of indicators as well.

Since the indicator uses a data series from the hosting NinjaScript, it will be synchronized and you would not need to call Update() in the getter of the child indicator for that plot's Series.

As for additional examples with different types, I have one other example I could share that demonstrates this process with a dictionary. This is the only other example that I have prepared to share. The same concept can be applied to other types.

That thread/example can be found here: https://ninjatrader.com/support/foru...d.php?t=108778