Hello dear friends,

I have a cash account in a US stockbroker since about 15 years.

I´m from (France) and I´m live in here (Paris) since born.

In the last 15 years I did not pay any TAX (capital gains) in USA; now I need to know if I change my account from cash account to margin account (for daytrading); if is the same thing ... that is, I am exempt/free from paying taxes in US soil.

Thank you very much.

You, as a non-citizen, can buy stocks in the same manner as are U.S. citizens. One option is that you need to open an international brokerage account, and then works with that broker, placing orders to buy and sell stock through a person at the brokerage. As a non-citizen, your status as a resident / a non-resident alien will affect taxes to IRS . I guess you need to contact your broker for more accurate professional help. There are no citizenship restrictions on trading in the U.S. stock market. The stock market is open to anyone who wishes to participate, with certain limitations such as age and those with potential insider trading information