Beginners basically don't have to understand anything. It doesn't matter much. After doing it for a while, the first thing to pay attention to is the trend of the US dollar. This is not a huge capital operation, and the technical side is greater than the fundamentals. The increase in crude oil inventories in the United States indicates an oversupply of crude oil, and the United States is the world's largest demand country for crude oil. Therefore, the supply and demand of crude oil in the United States is of course also of great concern to the market. Usually, if the inventory data is high, crude oil futures will fall.

On the other hand, your relationship between the dollar and crude oil is a bit upside down. Commodities are all priced in dollars. Therefore, it is common for the dollar to strengthen (usually the dollar index will also rise). The cost of crude oil futures is relatively expensive for investors, and the demand for crude oil futures decreases, which makes crude oil futures fall.