Yeah, USD determines financial conditions in the world = pace of global credit expansion, I guess this paves the way for equity markets too where the risk priced in is an ease of access to credit sources (i.e. borrowing costs)One of the biggest reasons is definitely the US debt instruments held by other nations - it amounts to about $7 trillion.
USD is major currency all over the world that is why changes in its trend affect on other currencies too. All major currency look like they are interrelated .I found out that even if the currency pair is not related to USD, EUR AUD for example, it is still somehow being affected by USD news. My position was suddenly reached stop loss in a few minutes. Why is that?