The GBPUSD has knocked on the door representing the low from yesterday and so far, has not been allowed admitance. The price has been turned away over the last two hourly bars. A move below should look quickly to the 1.5483 and then 1.5473 lows from lows in June (see chart above).
The midpoint of the move down comes in at 1.5524. I would think that should the price move above this level today, the low end shorts/sellers would look to cover up. The close from yesterday came in at 1.5523. This too would be a concern for the sellers.