There are many reasons that affect the trend of futures, and different varieties will have different reactions. Tell you a few points:

First, the relationship between supply and demand (commodity production, inventory; Demand from major consumer countries)

B, exchange rate changes (when goods are priced in currency, foreign exchange fluctuations will have a certain impact on commodity prices, especially the change of the exchange rate of the US dollar).

C. national policies (tariffs, export tax rebates, etc. ) is a major commodity producer.