I'm trying to use an Indicator in combination with a RollingWindow as described here:

Combining with Indicators

My project works with multiple tickers, so I don't have a simple self.symbol to refer to.  In my Indicator update handler, I expected to be able to ask either the sender or the updated value which ticker it related to, but they are both returning emtpy strings.

I'm attaching a reduction that demonstrates the problem.  I'm new to the platform so I don't rule out that I'm doing something wrong.

Author