This is huge for those looking to get into trading with a smaller account. Normally–if you are trading with less than $2k–commissions will eat up your account and make it almost impossible to do anything except for buy-and-hold (that and the PDT rules). Without a desktop app, I don’t see it being a viable option for real day-trading, but could be a great tool for beginners looking to get their feet wet with doing a few trades a week.