Has anybody tried the TT simulator from velocity futures? It is free if you fund an account or $150 a month. Apparently you get live market prices and the program keeps track of your osition instead of sending them to the market.
http://www.velocityfutures.com/tt-simulator.html
http://www.velocityfutures.com/simulator_futures_trading.html
http://www.velocityfutures.com/tt-simulator.html
http://www.velocityfutures.com/simulator_futures_trading.html