Tradingsim es un simulador de day trading del NASDAQ (solo hay que registrarse)
Basically, it gives you a minimal sim-trading “platform” right in your browser window (cross-platform: I just used it on my mac). You can look at a single NASDAQ stock at a time in minute charts, with a few indicators and drawing tools available. Then, similar to ninjatrader replay, you have play, pause, and fast forward buttons to control the action. They have 25 days of action on each symbol for you to practice against, and new data is available each night. The charts are intraday… this is for daytrading.
(Review de Movethemarkets.com)