Hi,
My idea is about allowing defining an expression as filter, either in a text, that will be compiled and read (like in loopback4 for example) or in a logical expression stored in a boolean variable.
For example: filter1 = a>b and b <>0

And use it in filtering Aggregates in the tab: filters.

So in stead of: 



It will look like this:

This allows not only the reuse of the same filter many times in stead of writing the same expression many times, but also allows to programmatically change the filter's expression. 

Kind regards,
Sirajeddine