Online Stocks

How old do you have to be to trade stocks online?
I’m 13 and want to buysell stocks online maybe with a place like E*Trade or something similar.
What would I have to do in order to be able to?
Do I need mom’s permission or what? Can the account be mom’s with my money and my “Advice”?
I am sure you must be 18. Go to e-trade and read the user agreement. You can also speak with your mom, she might be willing to help you futher
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