Plotting an indicator from a secondary data series

[annettes]

I am developing a multi-time-frame strategy with 2 time frames and I want to plot indicators on each time frame - an EMA on the primary data series and a price action swing oscillator on the secondary data series in a second panel.
My problem is that Add (to add the indicator for plotting) can only be used in Initialize(), but I can't use BarsArray[1] in Initialize() because the bars objects don't exist yet. So how do I plot the indicator from the secondary data series? In other words this is what I would like to be able to do, but can't:

        protected override void Initialize()
        {
            CalculateOnBarClose = true;

            ema = EMA( EMAperiod );
            ema.Plots[0].Pen.Color = EMAcolor;
            ema.Plots[0].Pen.Width = EMAlineWidth;
            Add( ema );
            
            Add (PeriodType.Minute, filterPeriod);
            paso = PriceActionSwingOscillator(BarsArray[1], dtbStrength, swingSize, swingType, useCloseValues);
            paso.Panel = 2;
            Add(paso);
        }

[NinjaTrader_CodyB]

Hello,
You would not be able to have an indicator plot off of BarsArray[1] natively from a strategy. You would need to create an indicator that plots off of the secondary data series and then call that indicator in your strategy.

[annettes]

Is there an example of an existing indicator that does that, so that I can see how it is done?
Thanks.

[NinjaTrader_CodyB]

Hello,
I have created an example and attached this of how you could do this.
Please let me know if you have any questions on the example.