First, I am an IB customer and generally have a favorable opinion of IB. However, if you start up TWS and log on as: username: edemo password: demouser you are logged into IB in a demo mode with a bold heading that the data is 15 delayed. If only it were that simple. The problem is not that its delayed, the problem is that there is next to no volume and next to no trades. If your intention is to do simulated trading with 15 minute delayed quotes, look elsewhere. I tried this with a number of stocks (IBM, MSFT, MRCK) and a future (YM). But may be well known, but it was a surprise to me. Too bad this doesn't work like it first appears.