Quote from fixedgrin88:
protrade securities and broad street also use das pro. also, choicetrade and a few other companies use das too. there are a lot of options out there, but i hear speedtrader is great because they have a lot of support. ispeedtrader and idas are an iphone app.
some people confuse the speed of their own computers and internet connection as something wrong with trading platforms. das is very lightweight, it's less than 5mb. if you have a good amount of ram, you should be trading as fast as the pros