The yen continued its decline against majors as investors expect another coordinated intervention by the Group of Seven after their first intervention in foreign exchange market for the first time in more than a decade last Friday.
Amid the absence of important fundamentals from major economies, eyes are directed towards the situation in Japan and Libya as radiation leaks ease, yet not fully under control, while Western countries triggered the second air attack on Libyan defense forces.
The ease in the Japanese radiation pushed shares up while the ongoing battle in Libya caused oil prices to trade above $103 a barrel.
With regard to the dollar-yen pair, it rose to a high of 81.31 before it retreats to 81.07, where it is currently trading, while the day's low was recorded at 80.71.
The trading range for this week is among the key support at 78.00 and the key resistance at 82.80.
The dollar index, which tracks the dollar movements versus a basket of major currencies, dropped to a low of 75.48 from the day's opening at 75.62 ahead of the release of US existing home sales at 14:00 GMT.
Moving to the British pound versus the dollar, it advanced for the third day to trade near the day's high at 1.6290, after the breakout of 1.6220, where the day's low was seen at 1.6202.
The trading range for this week is among the key support at 1.5960 and the key resistance at 1.6500.
Concerning the euro-dollar pair, it also surged for the third consecutive session to trade at 1.4186, where it fell from the day's high of 1.4192 while the day's low was set at 1.4144.
The trading range for this week is among the key support at 1.3980 and the key resistance at 1.4420.