Do I Need To Use A Stock Broker? If you're planning to invest in the stock market then you will need to understand the fundamentals of stock market investing first. One of the key things you need to know is that you will need to use a stock broker no matter what your knowledge of the market is. The stock broker can be a single person you hire or it can be done online through a firm like E*Trade. There are two huge two differences...... Similar Editorial : by Dean Forster. | Source : Hot Penny Stock