What Is a Broker — And How to Choose the Right One
Your broker is the gateway to every market you'll ever trade. Understanding how brokers work — and where their incentives lie — is critical before you deposit a single dollar.
Basics · June 28, 2026 · 5 min read
A broker is an intermediary that executes buy and sell orders on your behalf in financial markets. Without a broker, you cannot access most markets — stock exchanges, forex markets, and futures exchanges only deal with registered member firms. Brokers provide you with a trading platform, order execution, custody of your assets, and (usually) educational tools and data. In exchange, they charge commissions, spreads, or both. Understanding how your broker makes money is essential for understanding where your interests align — and where they don't.
Types of Brokers
Discount brokers (Robinhood, Interactive Brokers, TD Ameritrade/Schwab, Webull) offer low-cost order execution with minimal hand-holding. Full-service brokers offer personalized investment advice, retirement planning, and portfolio management — but charge significantly more. Forex/CFD brokers (IG, CMC Markets, OANDA, Pepperstone) specialize in leveraged products like forex pairs, CFDs, and indices. Futures brokers (NinjaTrader, AMP Futures, TD Ameritrade Futures) specialize in futures contracts. Many traders use multiple brokers for different markets or strategies.
Payment for Order Flow: A Hidden Dynamic
Many 'commission-free' stock brokers like Robinhood make money through Payment for Order Flow (PFOF) — selling your orders to market makers who execute them. The market maker profits from the spread, and the broker gets a payment for routing the order to them. The result: you get 'free' trades but potentially slightly worse execution prices than if your orders went directly to the exchange. For most small retail trades, the difference is negligible. For active traders placing large orders frequently, execution quality matters more than commission rates.
What to Look for in a Broker
Key factors when choosing a broker: Regulation — ensure the broker is regulated by a credible authority (SEC/FINRA in the US, FCA in the UK, ASIC in Australia). This protects your funds. Execution quality — does the broker fill orders at the quoted price or is slippage common? Commissions and spreads — total trading cost, not just the headline commission. Platform reliability — does the platform crash during volatile markets (the worst time for a broker failure)? Asset selection — does the broker offer the specific instruments you want to trade? For US retail traders: Interactive Brokers is generally considered the gold standard for active traders.
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