Demo trading is just to know how the trading mechanism works. How to open and close a trade. How to use MT4 for trading. But the real learning begins when you start to trade with real money. Trading with real money involves emotions that cause most of the mistake. You can also use demo to test your trading strategy. A low probability strategy can give you profit if you have a strong trading mind set. I am trading with Eurotrader broker as it is a regulated broker. I like their trading platform. It is an amazing platform with no requote.