Mid, the guy to read is one John Murphy for insight on precious metals and FX - a simple approach is to view Gold as the alternative currency to USD - especially on short term.
There is a little more to it, but have a look today - see the big push up on Gold, then check USD/JPY and the timing of the move down.
Then home into Eur/Usd at the same time - not a time to buy the dollar.
Have a good weekend.