ISONORAFTER is a nifty function that probably gets overlooked often. At it's most simplest use, it's very easy to understand. When you start to stack triples however, it can get a bit heady trying to understand how the function is evaluating.
ISONORAFTER: evaluates a table by field conditions and returns T/F result.
Documentation: https://docs.microsoft.com/en-us/dax/...