When you book a transfer with OFX during the weekend, the transfer may cost more than the same transaction if you booked it on a weekday. Typically, foreign exchange markets are open from Monday to Friday. However, on weekends and certain holidays when the markets are closed an additional markup may apply. All transactions are governed by OFX’s Terms and Conditions which includes Margin information. For more information please visit our Terms and Conditions page or contact an OFXpert for more information.