Forex brokers operate differently than stock brokers because forex trading does not occur on a stock exchange. While this can have its advantages, it does reduce the amount of official regulation, and therefore you must only use a forex broker you trust to avoid unfair trade.
Forex is the exchange of currency, and typically, derivatives are used to trade forex because it allows the necessary leverage to profit from small currency shifts. Using leverage, even a small percentage shift can mean several hundred dollars profit or loss. Naturally, you will have to make provisions for any losses with most forex brokers.
Forex brokers employ clever trading tools to help you avoid risk. For example, a stop-loss order will automatically sell a currency if the market moves against you beyond what you can afford. The forex market is the largest and most liquid in the world, so forex trading typically observes longer hours and quick selling.
Forex brokers may earn a commission from any profits, and most forex brokers rely on a spread to make money. The spread is a minimal difference the forex provider adds between the price it is willing to buy a specific currency and price it is willing to sell a certain currency. For forex trading purposes, it means the first few points of a price movement got to the broker. Exact spreads and commissions differ between forex brokers.
There are many tools and resources available online about forex, or for more information, speak to a forex broker.