Feedback request for series operations

[WalterW]

I terms of functionality, making a time series when the values are cross-sectional is something I’ve wanted to do often. See;

Calculating Industry Growth with Regression

Calculating an industry’s growth in sales or operating income should not start with the industry’s average or median sales or operating income. Instead, it has to start with the sales growth or operating income growth of each company in that industry, and then take the average or median of that. That’s how all industry growth factors are calculated, and it’s the standard way of looking at industry or sector growth. One can calculate the sales growth or operating income growth of a company using…

GetSeries accesses pre-built series. If it could be extended to building a series dynamically, that would be cool.

Maybe something that piggybacks on the Aggregate Series syntax;
GetUnivMedian(“Sector=Tech”,“OpIncTTM”)
so this would work;

EMA(20,0,GetUnivMedian("Sector=Tech","OpIncTTM"))>EMA(20,10,GetUnivMedian("Sector=Tech","OpIncTTM"))

But even that’s not dynamic enough since I don’t want to specify the sector/industry ahead of time. I want the sector to be implicit so that I can use the rule in the Buy (Sell) sections of a simulation.

I don’t know what that syntax would look like.