When dealing with mathematical calculations or complex queries it's easy to lose track of parentheses.Check the attached image for an example of highlighted parentheses on Notepad++.
I'm happy to announce that the upcoming release of 9 (and 10) will include this feature. Hope you like it and, as always, we're expecting your great feedback!
I'm using the latest version of Service Studio P10, and this idea is not implemented in the Advanced SQL editor, but only in the Expression Editor.
It would be very nice to have this feature available for Advanced queries in a soon-to-be-released version, because, many times, we have to maintain badly formatted queries and/or complex queries.
I agree, but you'd better create a new idea for it, as this one's marked as Done.