It is best for you to contact your broker with questions such as this. All brokers and brokerage accounts have different policies and rules. Only your broker can provide 100% accurate information. With that said, some members have posted this very same question in our forums. A link follows but do consider this as only general advice. You should always ask your broker directly about important matters that may impact your account and your funds: https://forums.bearbulltraders.com/topic/1764-canadian-account-problem-cadusd-with-ibkr/