Buy: Long, bullish

Sell: Short, bearish

Open a position: Open a new position.

Close Position: Closes an existing position, in the opposite direction to the existing position.

Pingjin: Close the position opened today, and the handling fee will be charged to the single side.

Long Open: Open a long position. Short Open: Open a short position.

Double open: long and short positions are opened at the same time. Double Flat: Close the position while going long or short.

Long Close: Close a long position. Short: The closing of a short position.

Multi-swap: Two longs change hands. Empty Swap: Two bears change hands.

1. When Party A buys and opens a position (long opening), Party B may have two situations to make a transaction:

1. The long position before Party B sells is called a long change of hands (multiple exchange), and the position difference is 0.

2. Party B sells a new open position (double opening), and the position difference is positive.

2. When Party A buys and closes the position (short close), Party B also has two situations:

1. If Party B opens a new short position to sell, it is called a short change of hands (short exchange), and the position difference is 0.

2. When Party B closes a long position and sells, it is called a long short position (double flat), and the position difference is negative.

3. When Party A sells and opens a position (short opening), Party B also has two situations:

1. Party B buys and opens a position, that is, the long and short sides open a position (double open), and the position difference is positive.

2. Party B buys a short position before the flat, that is, the short position changes hands (short exchange), and the position difference is 0.

4. When Party A sells and closes its position (long draw), Party B also has two situations:

1. When Party B buys and opens a position, it is called a multi-party change of hands (multi-exchange), and the position difference is 0.

2. Party B's short position before buying close is called long short opening position (double flat), and the position difference is negative.