1, the so-called internal market refers to the stock trading at the purchase price, and the transaction price is the purchase price, indicating that the sale is more enthusiastic. The transaction price is called the inner board according to the purchase price. When the transaction price is at the purchase price, the spot quantity is added to the cumulative quantity in the inner disk. When the cumulative amount of the inner disk is much larger than the cumulative amount of the outer disk, and the stock price falls, it shows that many people are selling stocks.

2. In the external market, the buyer of the stock buys at the seller's selling price, and the trading price is the application selling price, indicating that buying is more active. When the transaction price is at the selling price, the transaction quantity is added to the cumulative quantity of external stocks. When the cumulative number of external stocks is much larger than that of internal stocks, it shows that many people are rushing to buy stocks, and then the stock price has an upward trend. The external disk is the transaction of the seller's selling price, and the sales statistics are added to the external disk. Usually, in domestic stock software, the red number indicates the external disk.