I’am graduating highschool and want to become a investment banker on Wallstreet. What will I have to do?

You need to go a top school and get a business degree. This should be an Ivy League school — such as Harvard or Princeton — or another well-regarded institution, such as Stanford or the University of California at Berkeley. MIT is also great — I know two young people who graduated from there recently who are already making millions per year on Wall Street. Study hard, and good luck!
References :

eat a whole lot of wheaties, and watch " wall street " about 5 times a day…..charlie sheen is awesome in that one….

or just start wearing a suit alot and carrying a briefcase. if anybody asks you what you do, just say "i’m an investment banker, pleased to meet you" . make sure you stand around on wall street alot with your cell phone to your ear. once in awhile say "buy" or "sell"….you get the gist….

or you could go to college and get a business degree
References :
harvard studies

Your chutspa is commendable.

earn $5,000 and invest it into a biz of your own
and see how you do. By the time you have
grad’d from college, you should have a $10M
net worth. Then, you can become your own
best client.

or the biggest egoist.
References :
college biz teacher