A Forex broker is a financial institution that facilitates the buying and selling of foreign currencies in the foreign exchange (Forex) market, providing traders with access to various currency pairs for trading. They offer platforms and tools for executing trades, along with features like leverage, margin accounts, and educational resources. Brokers can be categorized into market makers, which create their own prices, and ECN/STP brokers, which provide direct access to the market. Choosing a reliable Forex broker involves evaluating factors such as regulation, trading fees, available trading platforms, customer support, and user reviews.