GBPUSD broke above 1.5471 resistance and reached as high as 1.5519, further rise towards 1.5522 (Apr 15 high) long term key resistance is still possible later today, a break above this level will indicate that the downtrend from 1.7042 (2009 high) is complete. Initial support is at 1.5445 followed by 1.5400, as long as these levels hold, uptrend from 1.5124 will continue.