It would be nice if you could have some kind of "leading edge" trigger on it, so if there's a transaction from a merchant that's unique in, say, the last two mo

It would be nice if you could have some kind of "leading edge" trigger on it, so if there's a transaction from a merchant that's unique in, say, the last two months, you get an SMS. If someone steals your credit card and goes on a shopping spree they're unlikely to do it at the same stores you go to.