Sometimes people want to trigger on something that is not easily detectable. When they open a specific file, or change space, or visit a specific web page or the like.
An alternative that can be a useful solution is to trigger a macro manually that both does the action, and then performs whatever else you wanted to do. So make a macro that opens the file and then does other things, or changes space and then does other things, or opens a URL and then does other things.