British Pound has been in a free fall since 2008. A year a ago (January 2017) it started doing a retrace and pulled back to the fib level. It didnt manage to establish itself above the fib level forming a double top. Now it started falling again. Expect a significant drop (the size of double top formation - from neck to top) when it breaks through a yearly trendline. That should happen in a few days. Today (28.04) it dropped massively forming a gap (if you look at normal candles, I used Heiken Ashi in this chart). A falling gap (window) is a sign of further bearish trend. Tomorrow it might slightly pull back into ATR channel (today it fell out of it). And in a few days we should see a further ride down. Prepare for for more GBP pairs sales esp. against traditionally strong currencies as safe haven JPY or gold driven AUD.