Vanisher watches all your debuffs, especially DoTs, and vanish/cloak CDs and tells you whether it's safe to vanish. It takes into account that magic spells can be removed by cloak of shadow and will flash red if your cloak is ready. But if it's not ready or you have physical DoTs on you, it will show red border.
It's just like a regular button (unclickable) which you can place anywhere around the screen, lock/unlock and scale.
You should use your own cooldown timer.
To config, type /van for more information.
Normal: Green border
Vanish CD: Red border
Spell DoT & Clock CD: Red border
Physical Dot : Red border
Spell DoT: Blue border & red flash
-- May 8, 2011 | 1.12 Release
Fixed a bug where new DoTs are not saved.
-- May 4, 2011 | 1.10 Beta
Now supports WoW 4.1!!!
Added a configuration frame in the default Blizzard Interface.
Fixed a position error.
Removed Hemorrhage from the watch list.
The last 3 seconds of any DoTs should not be counted because of the Vanish buff. Vanisher now takes that into account.