No, it is not necessary to disable/allow the pop-up blocker for trading. The software opens in a new browser. However, to access statements or reports on your account through the web based version of the trading platform, you will need to allow pop-ups from our trading websites.
Google tool bar: To allow pop-ups, log on to our trading website and click the Pop-up Blocker button. The button text will change to read 'Pop-ups OK, indicating that the Pop-up Blocker has been disabled on that site.
Yahoo tool bar: Click the Pop-Up Blocker menu and select "Always Allow Pop-Ups From". Select the trading site from the "Sources of Recently Blocked Pop-Ups" list. and Click "Allow". Further details are available here (http://help.yahoo.com/ )
You may also select 'Tools' from your internet browser, then select 'Pop-up blocker' and select 'Turn off pop-up blocker'.