Long position: long position = short position+long position.
Features: Increased positions.
For example, 12 hand is opened by long positions, 10 hand is opened by short positions, and 2 hands are closed by long positions, so there are 24 cash hands and the positions increased by 20 hands.
Multi-level: long position = long position+short position.
Features: the position drops.
For example: 10 long hand,/kloc-0 long hand and 9 short hand, then the cash position is 20, and the position is reduced 1 8.
Empty single opening: short opening = long opening+short closing.
Features: Increased positions.
For example: 12 short hands, 5 long hands and 7 short hands, then the cash hand is 24, and the position is increased by 10.
Short position: short position = short position+long position.
Features: the position drops.
For example, the short position is 15 lot, the short position is 1 lot, and the long position is 14 lot, so the cash position is 30 lots and the position is reduced by 28 lots.