David - I use MyBroker for trading Options on-line and for r/t charts. lots here use it as a feed to Sierracharts as well. MyBroker is free if you place one deal on-line each month with ODL securities. I have used it with a 56kbs modem as well as 64 and 128kbs ISDN without problem, but it is better with ISDN. Like you - I can't get broadband.
I have used it with NTL (modem), Freeserve and surfanytime (ISDN) without trouble. I have heard much negative comment about AOL with regard to compatibility with trading platforms. Time to get a new ISP?