TradeStation 8.1 with owndata 2.4 can be used as "standalone" much in the same way as my trusted TradeStation 2000i which is known to be a resource hog. I am starting to get interested in making the move to upgrade. Can anyone tell me: How is the 8.1 CPU utilisation in comparison? (when using owndata 2.4) Many thanks in advance. Sherlock.