GBPUSD Head & Shoulders Reversal

Looking for a reversal trade as we come into tomorrow's session. GBPUSD had a decent run today, but now looking overextended and exhausted. However, we can still see some upside potential as we haven't, as yet had any confirmation of a reversal. I've marked out a range that i will be looking at and one idea will be a break and retest to the downside on the 5min chart. Currently we are seeing a right shoulder forming giving us a potential head and shoulders pattern. Let's see what the London session brings.