Two-way trading means you can buy and sell at any time! Business here is different from traditional business! Buy. You can buy at a low price because you know the price will go up. It can also be because the price was high before and I wanted to try it. Now the price is lower than before, so I choose to buy it. Sell: You can buy when the price is low, and sell when the price is high and there is room for profit. You can also choose to sell, because the price is higher now, and you judge that the price will fall in the future.

In a two-way market, buying and selling can't be transformed, and it can't be simply considered as some kind of behavior. When the price goes up or down, you buy and sell people, not contracts, but goods. The price change is only the result of market movement, which is caused by the change of the power of buyers and sellers. In securities and futures trading, active purchase means that the buyer must buy at a higher price. Only by taking the initiative to buy can we promote the price increase. Active sales mean that we have to sell at a lower price. Only active trading volume can push the price down. Active buying volume and active selling volume are usually also called internal disk and external disk.

The basis for judging the number of active sales is that the transaction price is less than or equal to the previous purchase price; The basis for judging the active buying amount is that the transaction price is greater than or equal to the previous selling price. If the price is greater than the previous purchase price and less than the previous selling price, it is recorded as a fixed quotation. For flat disk, different software has different processing methods. According to the internal and external disk marks of the previous transaction, it is divided into internal disk or external disk, that is, if the previous transaction is external disk and the number of transactions is flat disk, then the transaction is also recorded as external disk; If the previous transaction is an internal disk and the transaction is a flat disk, the transaction is also recorded as an internal disk.

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