SugarBPM: trigger event when a field change to any value

Hi, I'm looking for a way to send an email when after x days description field not change.

I'm trying to setup the condition (description field not change) but I'm not able to find a way. Could someone help me please?

Start whit Save if sales stage is negotiation and amount is >10k and type in not renewal.

Wait 7 days

Check if the description is change or not.

If yes end, if not send an email and then end.