Contract experience to sum up: first, open a small order to enter the market to try, do the right direction can increase the chips, the profit is considerable, quickly close the position and leave, do the wrong either a small loss backhand, or close the position and admit defeat again. Second, if you open a position in the right direction with a heavy hand, you should take profit appropriately at a high level, otherwise you will quickly withdraw your profits. Third, generally buy into the wrong time mostly, learn to make up in time to rebound back to the capital or small win withdraw, if the rapid loss or even is about to be broken down, either a margin call or a margin call to reduce the forced liquidation line, or both at the same time. The premise is to be mentally prepared to die, if the general trend is opposite, it is difficult to return to the cost, and it is good to be able to withdraw as little as possible.