hi Ben,
Again, not that it matters but just for the record/stats :
OPEN HIGH LOW CLOSE
29/08/2012 0.620 0.620 0.505 0.560
28/08/2012 0.620 0.635 0.615 0.630
27/08/2012 0.600 0.635 0.600 0.635
24/08/2012 0.605 0.605 0.580 0.600
23/08/2012 0.585 0.620 0.585 0.605
So, 63.5c is the highest it got.