Having a solid risk management tool is a must. Before you use leverage you must define your stop loss levels. Know when to enter and exit a trade and always stick to it. Your trade size should depend more on your volume of trade. I always trade micro lots, be it on etoro, cityindex or fxview (my 3 brokers) because at this time in my life I can’t afford to risk a lot. That it's a part time thing for me, adding more money to my main income, don't want trading to become a burden instead of asset and start eating up my money rather than give.