Looking at this22 Sep 2010 12:37
sceptically (via the chart), it would appear there is a retrace after every jump through to new resistance levels.
If you look at the chart history over the past 12 months, you can see the new resistance level should settle around or above, 90p.
Hopefully, though as we are nearer to news and results it won't won't retrace that far and find resistance around 100p.
Hmmm don't now when to jump in for more, but am going to wait a week to see what happens.