GBPUSD Long on Trend Brake

GBPUSD on H1 had a clear and perfect trend, that got broken!
The price hitted the 0.68 / 0.5 zone of Fibbo and is on its way to retest on a powerful Support drawn on H4!
My thoughts are that it will reject on that Sup, so I'll be buying on 1.29740 - 1.2980 zone.