I have account with IB, TOS, and OX.
Here is my experiment posted on http://finance.groups.yahoo.com/group/OptionClub/message/3148
In short, I don't recommend IB to trade SPX.
When your limit order get scrolled through, if you cancel the order and put in a new one, you'll pay more on cancel/replace charges than what you can save.
Also, if you want to trade IC in one ticket, you can't do it easily in IB.
For SPX,
if the limit price is worse than the natual quote, they will hold it in their system, until the natual quote reaches the limit price, then IB will send the order to the floor. That means it is very difficult for shaved trades to be executed with IB.
Here is my experiment posted on http://finance.groups.yahoo.com/group/OptionClub/message/3148
In short, I don't recommend IB to trade SPX.
When your limit order get scrolled through, if you cancel the order and put in a new one, you'll pay more on cancel/replace charges than what you can save.
Also, if you want to trade IC in one ticket, you can't do it easily in IB.
For SPX,
if the limit price is worse than the natual quote, they will hold it in their system, until the natual quote reaches the limit price, then IB will send the order to the floor. That means it is very difficult for shaved trades to be executed with IB.
Quote from skdoyle1:
Can you define what you mean by Ticket Charges?
IB's commish schedule is hard to understand. And yes, they do have cancel/replace charges.
PS: I asked TOS to meet IB's sched, and they would only do 1.25 at the lowest. Scott said they are not competing with them.

