Which fees are charged in my Base Currency?

No, it is not possible to designate more than one base currency on your account. Please note that despite the fact that you must choose a single base currency, you may hold cash balances in multiple currencies in your account.

Additional Information…

The Base Currency for the paper trading account is taken from the live account and cannot differ. To change the Base Currency in the live account. See: How do I change the Base Currency for my account?…

IBKR will charge standard commissions on a liquidation, either fixed or tiered based on the current commission structure on your account.

Additional Information…

Forex Currency trades do not affect SMA.  

For more information, please visit the IBKR Knowledge Base or the IBKR Margin Education page.  …