I’m working on a workaround for this that is related and might be a useful way to think about what you want to do - I want service reps to get an alert when a customer has used up their number of service tickets in a 30-day membership period. I’m creating the property as described above, adding “in past 30 days” to the property name, and using a workflow to reset it every 30 days, possibly a date property driven by the member’s membership start date. For you, rather than resetting to 0, you could have the workflow copy the property value to another property value that is, # of tickets for a rep, etc.