I've long advocated the use of simulated trading as a way of practicing pattern recognition for active traders. What makes TradingSim unusual is that it is entirely web-based (no software to download) and the data are included in the subscription. You can simulate trading any day over the past two years and the simulator will replay that day with any symbols and technical indicators you choose. You can view multiple charts simultaneously, and you can speed up the replay or advance bar by bar. You place your trades on screen and the program tracks your P/L and historical performance. Great way to review the day; great way to practice trading for developing traders--or for experienced traders testing new strategies. One unusual feature for daytraders is that the biggest moving stocks are displayed, so that you can trade what is moving. Longer time frame traders can use the simulation to aid their entry and exit execution.