thinkorswim is headquartered in Chicago, Illinois and has offices in Bloomfield Hills, Michigan and Needham, Massachusetts. As a leading retail option brokerage firm, thinkorswim specializes in options and also offers customers a broad range of products including equities, futures, mutual funds, and bonds. The company supports retail and institutional traders through its own trading platforms and is widely recognized as the premier option software for execution, professional analytics and real-time position management. thinkorswim has revolutionized the option industry by teaching and executing complex, non-directional option strategies with single-click functionality that has now become the industry standard. thinkorswim continues to evolve the financial marketplace by delivering education and products that benefit the customer whether they are hedging, speculating or enhancing returns. Access TD Ameritrade's award-winning thinkorswim trading platform via thinkorswim Desktop, Web or Mobile App. Discover the differences and which one is right for you