Major currencies were little-changed after the end of the Easter holiday with little news to ease worries over the festering Ukraine crisis.
The euro-dollar rate clung to the narrow range held over the past week, with the euro gaining slightly to $1.3804 on Tuesday.
The yen also move little, while the British pound scored modest gains.
Kathy Lien of BK Asset Management said that the lack of economic news had contributed to the becalmed market.
But she warned that volatility could increase in the coming days, especially with data expected in the next 24-hours.
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"Three of this week's top six event risks are scheduled for release before the NY trading session," she said, pointing to inflation data from Australia, the HSBC purchasing managers index for China, and flash PMIs for the eurozone.
"For the past six trading days, there has been very little movement in the euro with the currency pair trapped within a 90 pip trading range," she said.
"Tomorrow's eurozone PMI report has the potential to trigger a breakout in the pair because it provides investors with the most up-to-date information on how the eurozone economy is performing."
