GBP/USD has sharply declined because of the Brexit "leave" votes. For the time being, volatility is still important on the market. Expected to further consolidate.
The long-term technical pattern is negative and favours a further decline. Key support at 1.3503 (23/01/2009 low) has been broken, as long as prices remain below the resistance at 1.5340/64 (04/11/2015 low see also the 200-day moving average).