Quote from lescor:
I know people who've done it. Having a US address may or may not be necessary, depending on which firm you are dealing with. From all the research I've done, taxes are not an issue, file and pay only in Canada. Set up the account in your own name, most prop firms won't accept a corporate account. You can write your NASD exams at any Sylvan Learning Centre.
The canadian brokers have pressured the US brokerage industry not to accept canadian accounts because they have such a lock on the industry and are owned by the big banks, who are tight with the feds. The difference in rates and services is so huge that the draw for any semi-serious trader is powerful. But it's not illegal for the trader. The firms are hesitant because they don't want any potential hassle from regulators who want them to register in Canada.
It's hilarious to read the 'trading with the enemy' clauses from most US brokers. You may set up an account if you are from any country in the world except Iraq, North Korea, Lebanon or CANADA.
But make some phone calls, because if you can make it work, it's worth it. No harm in inquiring and filling out some paperwork.
Excellent Post