Well success and failure is part of this business. You never can loss always in same business every time. So if once or twice anybody fails then better to practice more in Demo, and try to realize all those mistakes which we made in live trading and in the light of that bad experience make some suitable strategy next time and trade according to the range of your equity. if its under $150 then take only one standard lot or play in few mini lots only. This will help to manage your account more easily. Its better to trade in mini lots to avoid any big loss.