GUI parameters

[elliot5]

I have a multi-instrument strategy with an array of Add() contracts. In the GUI I want to have a parameter that inputs the current expiry month (06-20) for each array member.

[Description("ES Current Expiry Contract")]
[Category("Parameters")]
[Display(Name="ES Current Expiry Contract", Order=5, GroupName="My Parameters")]
public double ESExpiryMonth
{
get { return eSExpiryMonth; }
set { eSExpiryMonth = value; }
}


which would insert the value as so:


AddDataSeries("ES &" "& eSExpiryMonth", new BarsPeriod { BarsPeriodType = BarsPeriodType.Minute, Value = 405 }, "CME US Index Futures RTH");


Am I on the right track here?
Regards

[NinjaTrader_ChelseaB]

Hello elliot5,

As a heads up, using dynamic variables with AddDataSeries() is officially not supported by NinjaTrader to do.

From the help guide:
"Arguments supplied to AddDataSeries() should be hardcoded and NOT dependent on run-time variables which cannot be reliably obtained during State.Configure (e.g., Instrument, Bars, or user input). Attempting to add a data series dynamically is NOT guaranteed and therefore should be avoided. Trying to load bars dynamically may result in an error similar to: Unable to load bars series. Your NinjaScript may be trying to use an additional data series dynamically in an unsupported manner."

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

I think you are wanting to concatenate a string as the instrument symbol, is this correct?
Something like
"ES " + ESExpiryMonth

[elliot5]

Yes that is correct.