Crude oil index is API degree: API gravity (API for short) is a measure to express the density of petroleum and petroleum products. Generally, the better the quality of oil, the higher the degree. When the crude oil index goes up, the price of crude oil goes up, just like the dollar index.

The international oil price is the actual price. International oil price is the specific price reflected by the actual transaction with buyers and sellers, which can be used as the basis for investment. The price trend of spot crude oil changes according to the real-time change data of international oil price. This is the difference between the two.