Because it was tested before, there was a lag of about 20 seconds in early trading. It took more than 50 seconds to receive 30 seconds of data.

Investors (bulls or bears) who hold futures contracts and do not perform reverse operations (selling or buying) in the same delivery month and quantity are called "positions".

Tongda letter software is a multifunctional securities information platform. Compared with other market software, it has the advantages of simple interface and faster market update. Communication allows users to divide the screen freely and specify the content corresponding to each block. As for shortcut keys, it is also one of the characteristics of Tongda letter.