This is because the data provided by the futures exchange to the market information providers is only to buy one and sell one; Therefore, market information providers can only provide investors with information about buying one and selling one.

(2) What does futures trading mean?

The purchase quantity refers to; Willing to buy the contract quantity at the current price.

Sales volume; On the contrary!

(3) For example, are the purchase amounts of 100 equal to each other, or are they all long?

From the direction; The former is to do more! But investors include new long-term investors and former short-term investors (buying and closing positions)!