GBPUSD failed to break below the lower line of the price channel on 4-hour chart, and rebounded from 1.6337. Further rise to test 1.6593 resistance could be expected, a break above this level could signal resumption of the uptrend from 1.5854 (Nov 12, 2013 low), then next target would be at 1.7000 area. On the downside, a clear break below the channel support will indicate that the uptrend from 1.5854 is complete, then the following downward move could bring price back to 1.6100 zone.