welcome abroad dreamchaser, though i am not a stock broker myself but do heavily follow the stock market and taking a few basic accounting, finance, and economics classes during college helped me get a better understanding of the overall market. i would suggest if you are thinking about making a profession out of it, probably focus on those area along with your science and math classes. i have heard the stock broker's career is just as volatile as the market itself at times....so unless that's the kind of thrill you are seeking, i would also venture into being an stock analyst. i'm sure there are a few stock brokers here among us who can get you more insight into the lives as a stock broker best wishes!