Hey, I'm trying to make the eclipse boomy bar. You've added the power but I just found it was missing this in player/unit info.
The photo is from a private server version of weak auras.

The power trigger can be used for that.

It's for a little arrow to show which way it's going. We can have it moving around but you can't tell the weak aura to know which way it is moving around,

you could make it guess but there must be a back end thing in there