Dollars are traded on the futures market. We all know how that goes. Everything is priced in Dollars. So if Goldman Sachs, US Gov’t partner etc go heavy margined long on USD it automatically drives the other currencies inverse lower.
Meaning if foreigners try to buy US made products, they will be very very expensive, so they won’t buy so much and avoid exporting money to the USA producers for products. They would rather have the USA consumers export US dollars to them.
TPTB (pro foreigners) must be figuring a depression is coming and they need to get their last licks in before hand. “Screw the USA they are fat and spoiled and have too much”
Note the Chinese Yuan is pretty much pegged to USD, so they are in the same boat, fat and spoiled, and can afford to consume lots of imports from foreign nations.
Currency Charts:
https://finviz.com/futures_charts.ashx?t=CURRENCIES&p=d1