How-to-code-an-indicator-that-can-be-applied-to-another-indicator-in-Strategy-Builder

If I want to build an indicator from an indicator, then I can easily do it on the chart. However, in the Strategy Builder, I can only build a standard indicator from price components. I saw an opportunity to create a custom indicator that provides such functionality.

CODE:

 //generate parameters
        protected override void GenerateParameters()
        {
       AddParameter("Ind", ParameterType.Indicator, null);
        }

But I can't quite figure out how to write it. Please send an example indicator code that can be applied to other indicators in Strategy Builder.