I was thinking about putting up 5 years worth of one minute ticks (open, high, low, close, volume) for all major stocks and all futures into a mySQL database that is powered via PHP processing. The total amount of information might be more space than I can allot right now (around half a gig), so I just want to put up a test site with ES, NQ and the major stocks. First of all, if I use data from various sources (Qcharts, eSignal, etc), am I doing anything illegal? Quote prices should be public domain and no company should have priority over this information. I'd like to be able to give the user the ability to select to dates/times and download as much information he/she wants in whatever format that want it in. Any comments on this?