First of all, sorry for the late reply.
Indeed, it is not relevant that all blockers are green for the entire period of time you can configure in Econap. The measurements are only performed in the last minute before this period of time elapses. After this minute, the average value of the system loads is used to judge if the system should be put in standby.
If yes, the timeout window appears and gives you the possibility to cancel the standby manually. If at least one of the enabled blockers turns red within these 15 seconds, the standby will be canceled as well.
I hope I could help you with this explanation. In case you have further questions, please feel free to let me know!