Error alerting based on issue's age

Is it possible to setup an alert whose rules take into account the age of an issue? For example, could I setup an alert that is triggered when all of the following conditions are met?

  • The issue’s age is less than 24 hours.
  • An event is seen by more than 150 users in one hour.

I see the “Event is first scene” rule, but it seems like you can’t require that condition with any quantity condition. For example, it seems you cannot require both of these conditions:

  • Event is first scene
  • An event is seen by more than 150 users in one hour.

By the time the second condition is met, the first condition is no longer true. Is that correct?