You use "live" data for practice usually so if you can do it there in theory you can with real money. I imagine when you run with real money you dont risk as much as you do with practice money as you dont want to loose it, but yeah if you can make money on practice you should be able to with real money.
This reminds me of this newbie trading documentary I watched... they were practicing with live data and then were let lose on the markets. Man that really looks like it's opening the floodgates to be shitting bricks, because a lot of it is a mixture of luck and being extremely analytical very fast, and having an almost psychopathic coping mechanism for taking risks. It's pretty much gambling but with real stuff. I'm not much of a risk taker though.