Property TypeConverters on Indicators using AddChartIndicator()

[kevinenergy]

I've got an indicator that uses the IndicatorBaseConverter Class described here: https://ninjatrader.com/support/help...econverter.htm

I'm adding the indicator to the chart from a Strategy using AddChartIndicator.

The strategy doesn't need all the properties of the base indicators and therefore some of the properties that the TypeConverter tries to access are missing. This causes an error when I open the indicators dialog on the chart.

Is there any way from inside an IndicatorBaseConverter subtype to detect that the indicator is in the context of a Strategy's AddChartIndicator, so that I can override the logic? Or to disable the TypeConverter completely?

[NinjaTrader_Jesse]

Hello kevinenergy,

I am not aware of a specific property that the indicator would know of for AddChartIndicator. Have you isolated a specific case that you can provide so we could further research that? For example do you see that if you use AddChartIndicator with the help guide sample for IndicatorBaseConverter? https://ninjatrader.com/support/help...r_to_custo.htm

[kevinenergy]

Hi Jesse.

I have tested this using a blank strategy and the guide sample. It throws a NullReferenceException when you open the indicator dialog box. and select the Indicator in the list.

    public class MyCustomStrategy : Strategy
    {
        protected override void OnStateChange()
        {
            if (State == State.SetDefaults)
            {
                Description = @"Enter the description for your new custom Strategy here.";
                Name = "MyCustomStrategy";
                Calculate = Calculate.OnBarClose;
            }
            else if (State == State.DataLoaded)
            {
                var sampleTypeConverterIndicator = SampleIndicatorTypeConverter();
                AddChartIndicator(sampleTypeConverterIndicator);
            }
        }

        protected override void OnBarUpdate()
        {
            //Add your custom strategy logic here.
        }
    }​

[NinjaTrader_Jesse]

Hello kevinenergy,

It looks like you would need to add your own null checks for that use case, for example:

if(toggleValue1 == null || toggleValue2 == null)return propertyDescriptorCollection;