The single currency penetrated last week's key daily support at 1.2510, suggesting medium-term decline from 1.5145 has resumed and further weakness to 1.2457 and then towards 1.2400 is likely, however, oversold condition should prevent steep fall from there and 1.2329 low (October 2008) would hold on first testing and yield rebound later.    On the upside, only a breach of 1.2576 would signal a temporary low is made and bring stronger retracement to 1.2610 n then 1.2685.