Usually, hedging is an investment in which two markets are interrelated at the same time, the trend direction is just the opposite, the profit and loss cancel each other out, and the number of contract futures is relative.
Market correlation, in essence, refers to the correlation between market supply and demand that affects the prices of two different commodities. If the relationship between supply and demand fluctuates, it will also affect the prices of these two commodities, and the price trends are roughly the same.
The trend is just the opposite. In essence, the trend direction of the two transactions is opposite, so that no matter which direction the price moves, there will always be a profit and a loss. Of course, in order to break even, the number of commodities in the two transactions needs to be determined according to the fluctuation range of their respective prices. Generally speaking, the number is similar.