Been a long time since I've been here. I use Lightspeed and still do. The platform is good. Much better than Scottrade when I first got into this stuff. Lightspeed charges around $21 a month for market data and $100 a month if you don't generate $100 in commissions. The $100 is not a problem if you trade a lot. Their rates for commissions are very good. They used to clear through APEX which is a pain during tax time. Now they clear through Wedbush. There are more shortable securities which is a plus but oddly at times I find stocks normally always available for shorting through APEX not available at Wedbush like SCTY or BIDU. Overall, I would say that the transition has provided more available securities for shorting which is a good thing. Can't really say much about Tradestation since I don't use them but I think they do charge a lot more commission for trades.