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Basic knowledge of futures []
The current lot number is the number of this transaction.

Position difference is the difference between today's position and yesterday's position

Multi-single open position: the abbreviation of multi-single open position means that the position has increased, but the added value of the position is less than the current position, which belongs to active buying.

Short position: short position means that the position has increased, but the added value of the position is less than the current position, which belongs to active selling; For example, selling and buying in the above example can be reversed.

Double opening: refers to a transaction in which the opening amount is equal to the current amount, the closing amount is zero, the opening amount increases, and the difference is equal to the current amount, which means that both long and short positions increase their positions.

Double flat: refers to a transaction where the opening amount is equal to zero, the closing amount is the current amount, the opening amount is reduced, and the difference is equal to the current amount, indicating that both long and short positions have reduced their positions.

Change more and change less: short for change more and change less. If in a certain transaction, both the open position and the open position are equal to half of the current trading volume, and the positions remain unchanged, it means that the long position and the short position have not changed, but some positions have been transferred between the long position and the short position. Combining the state of internal market and external market, we define the transaction state as multiple and empty transactions in the internal market.