custom method

[trader3000a]

Hi,
How would I get started writing this (with my logic as well, of course), to use in my strategies? As an add-on? Any examples?

private double GetPercentile(double rank, ISeries series, int xbars)
{ my logic }

[NinjaTrader_Jesse]

Hello trader3000a,

What you provided is a C# method, ISeries was used in NT7 so you would need to change that to Series<double> for NT8, that otherwise would be fine as is.

Custom methods are not something which is documented with NinjaScript, you would need to look at external C# tutorials if you wanted to learn the underlying C# language and how to use custom methods in C#.