GBP firmed against the US dollar since 21st April. This pair has moved more than 1350 pips since 13th April, a great move in small span of time. This pair is strongly supported above the price area 1.5327. This pair ticked down little, overnight and correction is continuation is also expected.
Presumably, the trend is strong bullish but some correction is also acceptable in h4 graph, after the completion of AB wave, C wave has extended enough to itself.