1, short refers to short. Short selling, also known as short selling, short selling (Hong Kong) and short selling (Singapore, Malaysia), is an investment term of stocks and futures, and it is also an operation mode of the stock and futures markets.

2. Opening more positions means opening more positions. A term used in financial markets such as stocks, foreign exchange or futures: buying and holding stocks, foreign exchange or futures, waiting for them to rise and make a profit. Long is long. When bulls judge that the market is rising, they will buy stocks immediately, so long means buying stocks, foreign exchange or futures.

3. Closing positions refers to the behavior of futures traders to buy or sell futures contracts with the same variety, quantity and delivery month, but in the opposite direction, and to close positions. Simply put, it means "sell what you bought and buy what you sold (short)."