This requires you to have a certain firm offer and graphic foundation. Backhand is generally based on the behavior when the market in one direction ends and the market in the other direction will run. This requires a master who has a deep grasp of the form and is sensitive to the inflection point of the market. Backhand can be used not only in the daytime, but also in large bands. It can also be used to consolidate the market and see what cycle your operation cycle is.

Under what circumstances is the warehouse locked? In fact, I think this is unwise and has never been used. Generally speaking, you are optimistic about a variety for a long time, and you have a homeopathic list of this variety in your hand, but the market does not go straight, but consists of ups and downs. When the trend of varieties stops and needs to be repaired, you don't want to lose the list in your hand and miss this reversal. This method of locking orders is generally adopted, but few people can use it to the extreme. It is recommended to use less.