Do any of the brokers offer a demo with live quotes. The ones ive checked so far quotes are not live.
open e cry use live data on their 2 week trial its not 100% accurate, some time and sales prints are 'duplicated' meaning vol is not quite accurate. sometimes you get 460 contract print, then a 390 and then a 70 (both add up to 460). so you get double vol sometimes (i saw this on eurostoxx) its weird. i only realised this when i opened an IB live acc and noticed different volumes. apart from this the data is good, and there is nothing wrong with the price data. you get a 2 week trial only, but you can *cough* get a new email address each 2 weeks and then...