That, my friend, is the billion dollar question.
My full time job is as a commodity futures broker and I deal with the foreign currencies markets everyday.
The surprise FED announcement yesterday was a major boost for the foreign currencies around the world, a negative for the U.S. dollar. The U.S. dollar was down again today but we don't expect it to go much lower.
Unfortunately, none of us have a crystal ball as to the future of currency values. If we did, we'd all be billionaires. If anyone tries to tell you different, take it with a grain of salt.