Quote from traderNik:
Any but not all.
It means just what it says - you can request intraday data for 100 symbols max. You can choose any of the 3000 symbols in your database to get intraday data on. Let's say you open four charts in the morning - AAPL, GOOG and RIMM and the NQ. That's 4 out of your 100. If you close one of those charts and then later in the day you want to re-open it, that will count as another separate chart (at least I believe that's the way most symbol limit vendors work).