Show parameter in the settings when a bool value is true

[asmmbillah]

Hi,
I have got a public property for using as parameter in a strategy, but I want to give it a public access when a bool value returns true. Does ninjatrader 8 allow that. If yes, what will be the syntax please? If not, then any work around?

[NinjaTrader_Jesse]

Hello asmmbillah,

Thank you for the post.

Yes this is possible, it would require using a type converter. There is a sample of that concept in the following link. Keep in mind that instead of IndicatorBaseConverter you would create a StrategyBaseConverter.

https://ninjatrader.com/support/helpGuides/nt8/using_a_typeconverter_to_custo.htm

https://ninjatrader.com/support/helpGuides/nt8/?strategybaseconverter.htm

I look forward to being of further assistance.

[asmmbillah]

Tried the sample along with the strategy ref from the link, doesn't work. And also where exactly it should be added '[TypeConverter("NinjaTrader.NinjaScript.Strategies. MyCustomConveter")]' ? Because if I add it before the main strategy class, it starts showing various unnecessary properties. Please advise.

[NinjaTrader_Jesse]

Hello asmmbillah,

The code you provided needs to go on the class exactly the same as the indicator sample. The type converters type would need to be changed in the strategy to StrategyBaseConverter. Did you do that?




I look forward to being of further assistance.

[asmmbillah]

yes I did. see my code below:

[TypeConverter("NinjaTrader.NinjaScript.Strategies. MyCustomConveter")]
public class mainStrategy: Strategy
{

[RefreshProperties(RefreshProperties.All)] // Needed to refresh the property grid when the value changes
[Display(Name = "Toggle show/hide", Order = 1, GroupName = "Additional Parameters")]
public bool ShowHideToggle
{ get; set; }

[NinjaScriptProperty]
[Range(1, int.MaxValue)]
[Display(Name = "MaxDailyStopLoss", Description = "MaxDailyStopLoss", Order = 2, GroupName = "Additional Parameters")]
public int MaxDailyStopLoss
{ get; set; }
}
// below outside the main strategy class

// custom converter class for strategies
public class MyCustomConveter : StrategyBaseConverter
{
public override PropertyDescriptorCollection GetProperties(ITypeDescriptorContext context, object component, Attribute[] attrs)
{
mainStrategy strategy = component as mainStrategy;

PropertyDescriptorCollection propertyDescriptorCollection = base.GetPropertiesSupported(context)
? base.GetProperties(context, component, attrs) : TypeDescriptor.GetProperties(component, attrs);

if (strategy == null || propertyDescriptorCollection == null)
return propertyDescriptorCollection;

PropertyDescriptor maxDailyStopLoss = propertyDescriptorCollection["MaxDailyStopLoss"];

propertyDescriptorCollection.Remove(maxDailyStopLo ss);

if (strategy.ShowHideToggle)
{
propertyDescriptorCollection.Add(maxDailyStopLoss) ;
}

return propertyDescriptorCollection;
}
public override bool GetPropertiesSupported(ITypeDescriptorContext context)
{ return true; }
}

And also it show attached screenshot's unnecessary parameters.

[NinjaTrader_Jesse]

Hello asmmbillah,

I was unable to find another example using a strategy so I just copied the Indicator and renamed the types in the file. Here is an example attached.

Please let me know if I may be of further assistance.