VMtrader 

I pay $3.50 a rt, regardless of volume. When I'm trading more heavily (more than 200/day) I know I can get a rate elsewhere for about $3.40 or less, but when I trade less I'd be paying a lot more. At IB according to their tiered system I'd have to trade about 10,000 sides/mo to average $3.50.

Wow, You should do ask Mike suggests...That's a lot of trading

Big Mike 

Why don't you have a seat at the exchange, and save yourself a few thousand a month? Mike

I've looked into it; but as I may trade often some months, I do not other months. Also, I trade TF as well, so multiple memberships can be unreasonable. 200 trades a day is hardly a lot of trading.