I tried registering on IB but apparently I am not mature enough to have a margin account. I was recomended Tradestation, but have not checked the age req. on them yet. Is there any brokerage with similar quality as IB with equal (or close to) commissions where I can trade being under 21? Currently I only trade equities and no derivatives. I have thought of having my dad register me, but that would be a problem when I start claiming myself as an independent. Also, I could be an "advisor" for my "dad's" account, but I am not sure of the laws in Arizona with regards to investment advisors (and what licenses I need if any to manage a family account). Thanks for the help guys.