This is a great feature, but it's not working.

Currently it is not possible to set a 'Stale Deal' tag - one of the most useful reasons for Smart Tags!!!

The Rule filters for all date based values only allow 'is' (see screenshot).

And the available dat range options are all positive values

Nothing says "older than X days".

We can't make a smart take for "All deals where the latest activity is older than 14 days".

So this potentially great feature is achieving about 10% of what it is capable of.

Small update - big up side.

Please fix :)

PS: I am calling this a bug, because all the non date based filters DO allow things like: is not, equals, is less than, more than, etc...