TD Ameritrade is a stockbroker that offers an electronic trading platform for the trade of financial assets including common stocks, preferred stocks, futures contracts, exchange-traded funds, forex, options, mutual funds, fixed income investments, margin lending, and cash management services. The company receives revenue from interest income on margin balances, commissions for order execution, and payment for order flow.

Payment for order flow (PFOF) is the compensation that a stockbroker receives from a market maker in exchange for the broker routing its clients' trades to that market maker. It is a controversial practice that has been called a "kickback" by its critics. Policymakers supportive of PFOF and several people in finance who have a favorable view of the practice have defended it for helping develop new investment apps, low-cost trading, and more efficient execution.