It doesn't say it in now | Ignition User Manual, but I imagine this will work in Vision and Perspective expressions but not in tags. I imagine that this is because of the way that things get added to a watch events or schedules.
Comments:
You don't need == True when testing a boolean. The boolean will return a True or False.
Expressions can take line breaks, spaces and tabs to improve legibility.
Add a space after a comma and before and after operators (=, <, >, etc.), as done in written English. It makes reading much easier and will allow text wrapping on space in some editors.