A look at some various 4-hour charts shows a stronger move against the trend. This is the time to be patient and wait for a sign that this counter trend move may be ending.
This is where the use of technical indicators and trendlines can be or great help. This 4-hour GBP/USD chart shows that the market is moving up towards a trendline while the RSI moves up to the overbought range which is 70 or above. A move by the RSI to above then back down below 70 after the market tested the trendline would be about as good as it gets for a selling opportunity. But time will tell and we will be watching.