Although volatility surged in GBP/USD on Tuesday, the quote halted below 1.3115, which is a sign that the pair is likely to move towards 1.2853-1.2900. But the Marlin Oscillator is still rising and has not left the oversold area yet. Perhaps, the sideways consolidation will extend for another day or two, allowing the oscillator to continue growing.
The H4 chart shows this sideways consolidation, but it is likely that the flat will end soon and the further decline of GBP/USD will begin.