The dollar fell against the euro on Monday after comments from two members of the European Central Bank's governing council.
The Bank of Japan's decision to leave monetary policy unchanged pushed the yen up on Friday.
The dollar index slipped the day after a hawkish statement from the U.S. Federal Reserve.
The euro fell against the dollar on Wednesday after the Federal Reserve kept interest rates unchanged.
Currency experts expecting the euro to reach parity with the U.S. dollar have been labeled "tiresome" by one strategist.
The dollar held firm against a basket of currencies on Tuesday as traders await the Federal Reserve's decision.
The dollar dipped on Monday although an improvement in risk appetite after China's monetary easing limited the losses.
New economic data will be key in determining when the Fed hikes rates, says Robert Rennie, global head of FX strategy at Westpac.
The euro stumbled to a two-month low against the dollar on Friday.
The prospect of the euro falling to equal the dollar has returned with a vengeance after the ECB signaled it was willing to extend QE.
The euro tumbled on Thursday after European Central Bank President Mario Draghi said the bank discussed a further interest rate cut.
New Zealand's Deputy PM and Finance Minister Bill English discusses the impact of China's slowdown on NZ, and his country's ties with Australia.
The dollar rose against emerging market and commodity-linked currencies on Wednesday.
Lower Japanese exports are "symptomatic of weakness in global demand," not the yen, says Ray Attrill, co-head of FX strategy at National Australia Bank.
The euro rose against the dollar on Tuesday, after falling for three straight sessions.
The recovery in commodity prices and related currencies is still tentative, says Christy Tan, head of markets strategy in Asia at National Australia Bank.
The euro slipped to a 10-day low against the dollar on Monday, as investors eyed a European Central Bank meeting later in the week.
The dollar rose broadly, as traders reckoned the Federal Reserve might raise interest rates later this year.
The dollar rose against a basket of currencies as underlying domestic inflation strengthened more than expected in September.
The dollar sank to a seven-week low against a basket of currencies on Wednesday.