Trigger where an item value is equal to separate item value?

[heaje]

Is it possible to have a trigger that is based off of one item being compared to another item value? Here's an example:

Trigger when the last value from item1 does not equal the last value from item2 (item1 != item2).

[netmon]

That would be

{<server>:<ItemKey1>.last(0)}#{<server>:<ItemKey2> .last(0)}