The reading about an ex is for one specific moment: when the story is formally over and internally still open. It answers how the person relates to you now, whether there is a real chance of getting back together, and what you should do regardless of the first two answers.
It doesn't suit a break-up that happened this week: the cards will show an emotional storm rather than a state of affairs. Give the story at least a month. And don't take it if only one answer will do — "yes, he'll come back". With that request all three positions get misread.

