Clarification on AddChartIndicator

[tolisss]

Hi,

The AddChartIndicator help states

If you are adding an indicator which is dependent on the correct State of the indicator,

What exactly it means by correct State? How do I know which indicator have such dependency? Could someone provide a more concrete explanation?

also is this code equal to the suggested code from help?

private SMA _sma;
        protected override void OnStateChange() {
            if (State == State.DataLoaded){
                // Charts a 20 period simple moving average to the chart
                _sma = SMA(20);
                AddChartIndicator(_sma);
            }
        }

        protected override void OnBarUpdate() {
            // call SMA() historically to ensure the indicator processes its historical states as well
            double sma = _sma[0];
        }

[NinjaTrader_Jim]

Hello tolisss,

Thanks for opening the thread with your question.

I believe you are referring to this noted Tip in the help guide:

Tip: If you are adding an indicator which is dependent on the correct State of the indicator, you will need to ensure that you are also calling the indicator from the strategy in OnBarUpdate(), otherwise your indicator will only process in State.RealTime for performance optimizations.

This tip refers to allowing the calling indicator to process historical data. I have created a demonstration below.

Demo - https://www.screencast.com/t/oQhPAZjMlRU

Your code will have the same result. You can perform the same test as I have on a custom indicator to verify.

Please let me know if I can be of further help.