My friend loves opening different trades at a time, most at times is difficult for him to control what's should be. Trading on free chart with multiple opening can be very dangerous. Yesterday he experience unusual hit when bitcoin price drops again, four trades loss at once when the market go against him. Personally I don't advise multiple trade especially when you're not familiar with trade
Do you mean futures? If yes, I don't recommend futures as well it will make your investment gone in a seconds. Futures needed to be set according to your thing I mean it is better to set it in isolated with small multiplier only but then you can advice him to stop for awhile and make some research about how to futures and trades so he will not lose too much because it will be a regret of him soon.