Literally, the decline of US stocks may lead to the depreciation of the US dollar and the rise of non-US currencies.

but

The decline in US stocks is only an indicator of our judgment on foreign exchange.

There are many other indicators that will affect the exchange rate of foreign exchange currency pairs. For example, the Federal Reserve announced the new exchange rate, the US President's visit to China, the Greek incident, the oil spill and the outbreak of war.

Wait a minute.

I suggest you go to official website to learn about the financial calendar. There are statistics in daily finance and economics.