I made a copy of the HeikenAshi indicator so I could set the colors on my chart.
I can Add() it, but when I try to call crmHeikenAshi.HAOpen[0] or crmHeikenAshi.Values[0][0] and run a strategy, I get a very curious error message I had not seen before and I've Added() lots of other indicators:
Error on calling 'OnBarUpdate' method for strategy 'MamaHeikenAshi2': The indicator 'crmHeikenAshi' is intended for visualization and can only be used on a chart.
Can someone explain what causes this and how to enable this indicator to be used in a strategy please?

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