Enums or Drop-Down Lists as Strategy Parameters

[ChazJ]

Hi,

In strategy builder, the parameter selections include only the most typical variable types (int, string, etc.). What I am looking for is to be able to add a parameter that consists of an Enum or String List that is selectable by the user interface using drop-down or similar selection mechanism in the Strategies UI. I don't see any way to do this manually either with or without strategy builder.

Am I missing something, or is this not supported?

Thanks,

Charlie

[NinjaTrader_PaulH]

Hello ChazJ,

Thanks for your post and welcome to the NinjaTrader forums!

The strategy builder is not capable of generating a drop down list.

You can create this using Ninjascript, which is based on C# programming language, in the Ninjascript editor.

Please see this working example from the help guide tips section: https://ninjatrader.com/support/help...ned_parame.htm

You can also look at the indicator Pivots as another example of using Enums. The indicators code is available for viewing.

[ChazJ]

Thank you very much for your quick reply. It was very helpful. I was able to achieve what I was looking for by defining an enum in my Strategy code, then defining a default variable as that enum type with a default value in 'OnStateChange'. NT picked it up nicely and displays it in the Properties dialog as a drop-down list of values to choose from. Perfect.

Thanks again.

[ChazJ]

For those who might find this topic in the future - forgot to add that I also had to define the Property:

[NinjaScriptProperty]
[Display(Name="MyAddedProperty", Description="Description", Order=3, GroupName="Parameters")]
public PropertyType MyAddedProperty
{ get; set; }

where PropertyType is the Enum I defined. This, I am sure, is the key to displaying it in the Properties Window of the Strategy.

ChazJ

[UltraNIX]

Thank you very much for your quick reply. It was very helpful. I was able to achieve what I was looking for by defining an enum in my Strategy code, then defining a default variable as that enum type with a default value in 'OnStateChange'. NT picked it up nicely and displays it in the Properties dialog as a drop-down list of values to choose from. Perfect.

Thanks again.

Could you share your strategy example file with enums? I see codes in indicators, but having trouble to transfer it to strategy script file.

[NinjaTrader_PaulH]

Hello UltraNIX,

Thanks for your post.

Here is a link to an educational example in the help guide of working with an Enum: https://ninjatrader.com/support/help...ned_parame.htm

[UltraNIX]

Thanks, I found the code in one of the strategies, adapted it for my strategy and it worked. However, I found another issue: https://ninjatrader.com/support/foru...-items-in-enum