... For this reason lot's of flash traded are done, you look normally making profits 2-3% from every trade while keeping up the leaderboard/on the trading competition it's hardly I've seen anyone can pulled off.
Usually, in such tournaments, traders simply increase the trading volume, and in this case, the trader does not receive a profit from the order being closed. And such a trader expects to compensate his expenses for the commission spent with the rewards he receives.