Indicator Input Series

[HarvOS]

I have created two indicators. The first uses up - down volume from primary data series, calculated on each tick with tick replay for historical bars. Works fine. The second is the cumulative sum of the first indicator, calculated on bar close. Second indicator:

OnBarUpdate()
if (CurrentBar <= BarsRequiredToPlot) return;

if (Bars.IsFirstBarOfSession)
Value[0] = Close[0];

else
{ Value[0] = Value[1] + Close[0]; }

Very simple. The problem is I cannot seem to make the second indicator use the first as input. I change Input series to first indicator, but it will always use price data series instead. I tried several different input series without success. I've done this many times with other indicators on indicators. Where am I going wrong?

Also, I tried calling the first indicator from within the second by setting a variable = first indicator. All I got was a zero line. This second indicator only has any value in relation to the first, so no real reason to make it input flexible. Is there a way to force the second to always use the first as input series? Thanks.

[NinjaTrader_Jesse]

Hello HarvOS,

To use input in your indicator you need to use the Input series: https://ninjatrader.com/support/help.../nt8/input.htm

[HarvOS]

Hello HarvOS,

To use input in your indicator you need to use the Input series: https://ninjatrader.com/support/help.../nt8/input.htm

Something like this? Or earlier state?

State.Dataloaded
Input[0] = IndicatorOne();

[NinjaTrader_Jesse]

Hello HarvOS,

That would be from OnBarUpdate just like other series such as Close. Input series is the specific input that you pass to the indicator when you call it from a different script.

The help guide shows a sample of checking what type of input was passed and also how to use it to delegate logic based on the type of series. You would use it similar to Close and not assign it a value. Its value comes from the input you passed to the indicator.


Print(Input[0]);

Using an indicator as Input means passing it, for example SMA(EMA(12),12). The EMA is passed to the SMA as input. The SMA gets the EMA value by using Input[0] in its logic.

If you instead mean to just call the indicator from your code you would do that by calling the indicator name and plot:

double indicatorValue = IndicatorOne()[0];

[HarvOS]

Got it. Thank you!