Does anyone know whether Charles Schwab charge the USD 4.95 fixed commission again if your limit order is partially filled and you change the limit price? On a different note, this seems very expensive: Foreign Currency Transactions Foreign currency transactions are subject to a fee based on the amount of currency converted in a single transaction, as follows: Under $100,000 1% of principal $100,000–$249,999 0.75% of principal $250,000–$499,999 0.5% of principal $500,000–$999,999 0.3% of principal $1,000,000 and above 0–0.2% of principal https://www.schwab.com/public/file/P-1036363/PricingGuide_IS_042019REG23060-38.pdf For comparison, I pay Interactive Brokers around 0.002% in commission on FX transactions. Charles Schwabs margin interest is also expensive compared to Interactive Brokers.