the ai answer to stock sims
If you're serious about learning to trade as a skill: Skip the games and go straight to Charles Schwab's thinkorswim paperMoney. It has a steeper learning curve, but it's the closest you'll get to the real thing without spending real money.
It's always a good idea to try out a couple of different simulators to see which one fits your learning style and goals best. Happy (virtual) trading