Haven't posted to the ongoing weekly FX threads for a while, so this is a bit retrospective, but interesting nonetheless. (circled in yellow)
The screenshot shows the Dly GBPusd chart and the confluence of potential resistance at that 0580 area, being;
a. First test of the decsending trend line joining highs at 1162 (current yrly hi) and 0832 (red narrow dotted on chart)
b. underside test of the breeched ascending support trend line (green wide dotted on chart)
c. 61.8% fib of that 0832 to 0176 move.
The resulting move down has now taken out the 2 daily ascending trend lines (circled in red on chart) and the weekly ascending channel support (not shown here.)