GBPUSD may be forming a cycle bottom at 1.5326 level on 4-hour chart. Key resistance is at 1.5597, a break above this level will confirm the cycle bottom and indicate that the fall from 1.5997 has completed at 1.5326 already, then the following uptrend could bring price back 1.5700-1.5800 area. However, as long as the pair stays below the downtrend line on 4-hour chart, one more fall to 1.5200 is still possible, and a breakdown below 1.5326 could signal resumption of downtrend.