for anybody who trades using direct access. whats the big difference and the best to use? kind of confused. I understand there is a possiblity of "rebates" for ECNs also. I used to market and limit NYSE and routed thru BELZ. I started using ARCA limit all the time then. I usually take orders instead of placing them just because I dont want to waste time and get squeezed. Then I am a liquidity taker. I think even when the spread is more than 1 cent, and I place a bid or offer in between I still dont get a rebate? Maybe because stuff is so quick? I dont pay commission on any trades, only ECN fees. What about ISLD or anyhting else? combinding the use of different ones on getting in and getting out, and how do some people say "some ecns are faster than others?" I guess I just need a crash course on ECNs but I dont know anything about where to find this? I guess it really doesnt matter now.. I am only using 100 share lots until I get the hang of things and start making money but I know its going to be an issue when i start using 400, 500, 1000 share lots etc. Thanks