What is the meaning of crude oil inside the lock?
If the market fell, empty single profit, wait until the peak or low when the profit will be flat or off the list, which is a way to avoid risks
Suocang is holding more than one and the same number of empty single, such a role is to avoid excessive volatility in the market when the wrong risk, if the market is up more than a single profit
Is to keep the lock lock the current profits or losses, for example, when there is a single space on your hand, but the market rose sharply, and you are not sure whether we will go up, so you can buy more than a single temporary, to avoid greater losses, the single lock is long short
