Quote from Gord:
Been using QT for a couple of years and recently decided to explore swing trading (I normally day trade). This meant opening quite a few more charts. But when I get up to ten running QT begins to studder and freeze. The feed continues OK, but working with the charts (moving them, drawing, scrolling, etc.) becomes a lesson in patience. Every few seconds the program freezes for a fraction of a second. It can also be noticed in the moving bar indicator beneath the feed connect button - it stops and starts in coordination with the freezes. The problem is definitely connected to the feed, as when I turn the feed off all functionality returns to the charts - but of course no updated data.
For your additional charts, are they volume charts?
Just a guess...

