If you want to get a quick overview of all expressions in an application then the Expression Overview is the place to visit. Select Settings->Expression Overview or type ctrl+alt+e as a shortcut.
You can filter on different types of expressions and the find/replace is a great feature to use when the list becomes too long to overview.
Pay some some attention not only to Chart Expressions but also the others, especially Show Conditions.
The Expression Overview is one of the most important places to go if you have an application that doesn't perform the way you expect. See future Quick Tips for some of the things to look out for when it comes to expressions.
Cheers from the Scalability Team.
