ThinkorSwim

ThinkorSwim, developed by TD Ameritrade (now part of Charles Schwab), is a highly sophisticated trading platform designed for active traders, options specialists, and futures traders. It offers advanced charting, customisable indicators, a paper trading mode, and a powerful options analytics suite.

The platform features a built-in stock scanner, risk analysis tools, and professional-grade scripting (thinkScript), allowing traders to develop complex strategies. ThinkorSwim provides real-time streaming quotes, multi-leg options strategies, and in-depth market analysis. It's comprehensive desktop, web, and mobile compatibility makes it one of the most feature-rich retail trading platforms available.