What type of variable is used for this?

[lju45]

Hi,

I am trying to program a variable like this photo 1.

That is, I need to create a variable that can take several different values so that later I can optimize it.

Thank you

[NT-Roland]

Hi lju45,
This is an "enum". Enums can provide great benefit in various different scenarios. To pick different MA types is one of them.
Here is a link to an earlier post on this.

https://ninjatrader.com/support/forum/forum/ninjatrader-7/indicator-development-aa/98149-enum-values-a-parameters-in-nt8

NT-Roland

[NinjaTrader_ChelseaB]

Hi lju45,

NT-Roland is correct this is an enum.

Just an update, this reference sample is now maintained in the help guide.
https://ninjatrader.com/support/help...ned_parame.htm

[lju45]

Thank you,

If I want to use it in a strategy, how can I declare the type of MA? I mean, I can create an enum variable to select type (EMA, HMA ..) but then how Can I declare this type in the strategy? I want to have something like this: private _?__ MA1; So depending enum variable, this declaration is different. Is it possible?

[NinjaTrader_ChelseaB]

Hello lju45,

In the SampleUniversalMovingAverage reference sample see lines 52 through 85 where it is demonstrated how to switch between the selected moving average type used for the Value[0].

If you want to save the indicators to variables, you will need to make a variable for every indicator. There would be no switch for this.

[lju45]

Thank you, I have used the same as in the example, but when I go to Strategy Analyzer -> Optimization, I can't seem to optimize the MA type. How do I get to optimize that variable?

[NinjaTrader_ChelseaB]

Hi lju45,

Use the [NinjaScriptProperty] attribute to make an input optimizable.

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