On AlgoWizard, how to apply indicator on another indicator?

Goal:
To compute indicator on another indicator.

Use case examples:
1) apply EMA to Heikin Ashi Close.
2) apply EMA to RSI etc.
3) apply RSI to Heikin Ashi etc.

Problem:
As shown on the screenshot, when adding a new condition, there is no option to apply EMA to other indicators.

Hello,

we plan to add the average of an indicator function but the traditional indicator nesting for other indicators will not be implemented