GBPUSD is on a bearish market structure which we can see on the picture that it presented it's Lower Lows & Lower Highs. Price started to move sharply on the upside hitting the trendline resistance which confirmed a Lower High but not moving lower to create a Lower Low instead held its price near the trendline resistance. My overview of what might happen is we might see a breakout on the resistance and a retest back on out "Resistance" trendline making it our future "Support". That will be a confirmation for a market structure change.