Quote from CarlErikson:
$.12, right?
huh..finally find it-
Exchange Cancel and/or Modify Order Fees
Many exchanges charges fees for cancellations and modifications, and IB charges its customers to cover these fees.
Cancel Order Type Modify Orders Fees or
Cancel of Modify Fees Execution Credit *
US direct API stock orders (does not apply to US smart API orders) USD 0.12/Cancel or modify USD .24/API directed execution
US direct TWS + API option orders (does not apply to US smart orders) USD 1.20/Cancel or modify USD 1.20/Directed execution
