The dollar rose on Friday, boosted by a US jobs report, but was headed for a second straight weekly loss after tumbling the day before.
Some of the biggest gains on record for China's yuan sent currency markets spinning.
Investors were cautious about increasing bets on the greenback before getting fresh clues on the U.S. economy.
Dealers and investors in London returned to push the greenback to within 1 percent of December's long-term highs.
The dollar recovered from a two-week low against a basket of six major currencies.
Weaker-than-expected economic data weighed on the greenback and waning risk appetite boosted Japan's safe-haven currency.
The U.S. dollar hit its highest level in two months against the sterling on Wednesday on concerns over next year's Brexit negotiations.
The dollar inched up against the yen on Wednesday after upbeat U.S. economic data reinforced expectations for economic growth.
The dollar headed into the Christmas break on Friday just over half a percent off highs hit after this month's Fed meeting.
The dollar dipped for a second day as traders booked profits ahead of a batch of U.S. data later in the day.
The dollar took a breather from its run since the November 8 U.S. presidential election.
The dollar was boosted by Fed comments that kept alive market expectations for a faster pace of U.S. interest rate hikes next year.
The yen jumped on Monday on safehaven bids following news the Russian ambassador to Turkey was gunned down in the Turkish capital.
The dollar edged higher on Friday, holding near 14-year highs touched after Wednesday's Federal Reserve meeting.
The dollar surged to its highest level in 14 years on Thursday on anticipation of a more hawkish Federal Reserve.
The dollar hit a 10 month high against the yen of 116.45 after the Fed approved the first interest rate hike in a year.
Markets were still uneasy that a Fed meeting ending on Wednesday may provoke more investors to cash in the greenback's recent gains.
U.S. bond yields climbed on the back of expectations of broadly higher inflation, driven by a 5 percent rise in global oil prices.
The ECB's extension of its easing program drove the single currency to its biggest daily loss against the dollar since the Brexit vote.
The euro fell Thursday as the European Central Bank announced an extension of its quantitative easing programme.