The reason the dollar is relative gaining strange compared to other fiat currencies is a paradox right now...
First some things you need to be awear of:
The dollar is the worlds reserve currency, still...
What many foreign banks have done is to convert many of it's dollar reserves to american-quasi-debt-investment-hustle that turns out not to be worth so much....
When foreign people take out their dollar money in foreign banks, the foreign banks need to buy this dollar in the currency market and try to sell their american-quasi-debt-investment-hustle. That's the main reason for the bailout, the american taxpayers are buying back the bad debt....
The result of this is greater demand for the dollar, that drives the dollar price UP.....
This will last for a finite time, when trust in the dollar is gone, things start to get more ugly/fun...