At present, most of the world's large-value trade is settled in US dollars.

The rise of the dollar means that buyers have to spend more domestic currency in exchange for dollars, which indirectly means that the price of this commodity has increased. When the price goes up, people are less willing to buy it.

The seller thought that the goods could not fall into his hands, so he reduced the price. Anyway, the dollar has appreciated, and less dollars can be exchanged for almost the same domestic currency.