1. The trading hours of most commodity futures in the external market are from 9: 30 p.m. to 3: 30 a.m., of which foreign exchange and gold-based funds are 24 hours, and lme3 copper and new york crude oil ETFs are basically 24 hours.

2. The external market means that the buyer of the stock buys at the seller's selling price, and the trading price is the applied selling price, indicating that buying is more active. When the transaction price is at the selling price, the transaction quantity is added to the cumulative quantity of external stocks. When the cumulative number of external stocks is much larger than that of internal stocks, it shows that many people are rushing to buy stocks, and then the stock price has an upward trend. The external disk is the transaction of the seller's selling price, and the sales statistics are added to the external disk. Usually, in domestic stock software, the red number indicates the external disk.

3. The futures market is the place where futures contracts are traded, namely the futures exchange. There are many kinds of futures contracts, so different futures exchanges operate different futures contracts. There are many futures exchanges in the world, the most famous of which are Chicago Commodity Futures Exchange and New York Futures Exchange.