A broker is a person (or a company) that acts as an intermediary between buyers and sellers. In the stock market, brokers facilitate the buying and selling of stocks between traders.
The fees that brokers charge can vary depending on the type of service they are providing. For example, stock brokers may charge a commission on each trade that they execute on behalf of their clients. This commission is typically a percentage of the value of the trade, and can range from a few cents to several dollars, depending on the size of the trade and the broker's fee schedule. Some brokers may also charge a flat fee for their services, rather than a commission.
On StockSt, brokers are randomly assigned to each trader daily and they charge a flat fee that ranges from $2-$7 per trade.