Their service and support is good. However I find their charts and streamers constantly freeze and have to be restarted. DDE is just a piece of software that pulls the real time data into an Excel spreadsheet. See: http://investorshub.advfn.com/boards/read_msg.aspx?message_id=51317490 and... http://ih.advfn.com/p.php?pid=dde_documentation And yes, I am mainly using it for the buy/sell volume. Rick.