GBPUSD stays in a rising price channel on 4-hour chart and remains in uptrend from 1.4346. Support is at 1.5075 followed by the lower boundary of the channel, now at 1.4970. As long as the channel support holds, uptrend could be expected to continue, and one more rise to 1.5400 area is still possible. Key support is at 1.4873, only fall below these levels could indicate that the upward movement is complete.