Before you fully understand, only buy spot goods, do not use leverage. Leverage is like a magnifying glass for your abilities; if you already have the ability to make money, then this magnifying glass will help you make money faster. If you are losing money on spot purchases, then using leverage will make you lose money even faster. Your current buying and selling are all based on guessing and gambling, with no data support at all; it would be strange if you didn't lose.