For example, it is announced on the big screen of the vegetable market that 10 pork chops have been sold, each 1 kg. Because level2 doesn't know exactly how many customers have made this transaction with several booths, it has to be said that the business is normal, and it was bought by 10 for dinner. But in fact, it is very likely that a booth monopolized the business, and all customers of 10 bought it at one of its booths. It is also possible that a large family came and bought all the spare ribs left in the 10 stall. Look, different situations produce the same information on the big screen. This is also the reason why the main funds of level2 are inaccurate. Now a panoramic version of Ganlong has been released, which has solved this data problem of Shenzhen Stock Exchange. You can look at the data of 500 trading orders and the entrusted counterparty corresponding to each transaction, and the judgment of large orders will begin to be accurate.