How to register/update indicators with custom data? by Tadas Talaikis

Tadas Talaikis

| Reward Discussion

Hi, I'm trying to use



var _rsi = new RelativeStrengthIndex(_CustomSymbol, 20);

var Cons = new IdentityDataConsolidator();

RegisterIndicator(_CustomSym, _rsi, Cons, x => x.Value);

but getting

Runtime Error: Object reference not set to an instance of an object

Maybe I'm missing something, it's on clean algo.

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Tadas Talaikis

Accepted Answer

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Michael Handschuh

STAFF ,

@Tadas, can you share an algortihm? it's hard to debug these things without.

If you don't want to share it here, you can send me the project id and I can take a peek at it.

Tadas Talaikis

84.8k ,

OK, as it has purchased data, so I'm giving the ID: 128597.

Michael Handschuh

STAFF ,

Take a peek when you get a chance, there was an easy to overlook error in the code.

public class MyAlgorithm : QCAlgorithm

{

    public Indicator _myIndicator;

    public override void Initialize()

    {

        // ... init logic goes here



       var _myIndicator = // initialize indicator

       // the problem with the above line is it defined a new '_myIndicator' variable

       // within the function vs using the class level '_myIndicator' variable defined

       // above causing a null reference exception when attempting to access it

    }

    public void OnData(TradeBars data)

    {

        // this line will ALWAYS throw because we never set 'this._myIndicator'

        if (!_myIndicator.IsReady) return false;

    }

}

Tadas Talaikis

84.8k ,

Duh, three chars :-D Thank you, @Michael :)

Tadas Talaikis

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