I am a Canadian trading with Interactive Brokers. How should I manage my account if I use Canadian dollars and trade in the U.S. stock market?

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/