The single currency rebounded strongly on active cross buying in euro, suggesting erratic upmove from the 4-year low of 1.1876 to retrace medium-term downtrend remains in progress and further gain to 1.2327 is likely, however, resistance at 1.2355 should limit gain and yield a much-needed minor pullback later.    On the downside, below 1.2153 would signal an intra-day top is made and bring weakness to 1.2100, however, support at 1.2045 is expected to remain intact.