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Adding Commission Rates
You can add instrument level commission rates that override global commission settings. For example, you may set up a global commission rate for trading futures of $4.00 per side however you may have a reduced rate for trading the DOW Mini futures contract of $3.00 per side in which case you need to add this rate the DOW Mini contract in the Instrument Manager. Please see the Commission Tab section of the Options menu for more information on setting up commissions.