Looking at H4 Chart of the GBPUSD, it could be on a buoy but must not break the support at 1.6450/55 or thereabout (near your 15-min low side magnitude tagret mentioned earlier. The buoyancy from the H4 may go for a total of 5, 6, and 7 bars and you are on 4th along at the time of this writing...( 2 pm US Pacific time) and may try and reach out to 1.6580 or thereabout immediate high with a potential of testing 1.6615 before it goes for a correction of about 100/105 pips.