I have found that if you go to on an open chart go to tools,then options, and then charts, set max bars in history to 10,000 it helped my CPU problems I was having, now got 2 accounts running with a lot of charts open, EA'S running, and a lot of CPU robbing indicators 0n 1 gb. of Ram.Doing this 1 time covers all the charts you have up.

Hope this helps
mrtools