Generally speaking, futures are futures contracts. According to the contract, a trader can buy or sell a certain amount of a commodity or financial asset at a specified price at a certain time in the future, and its main function is to prevent the risk of price changes.

Futures are different from spot. Spot is a real tradable commodity. Futures are standardized tradable contracts based on some popular products, such as cotton, oil and financial assets, such as stocks and bonds. The subject matter can be commodities or financial instruments.

Shortness means that the loss is greater than the deposit in the account. After the company is strong, the remaining funds are the total funds MINUS your losses, and generally there will be a part left.