When the buyer's intention of a certain price is greater than the seller's intention, the price will go up, and the balance point will be found at another price above, which will lead to the price increase. The buying amount and selling amount of a transaction are always the same. The key is will, such as daily limit. The willingness to buy is very strong, and the willingness to sell is not strong, resulting in a small turnover. If a large number of buyers can't close the deal, the daily limit will be blocked.