I would love to know the thesis here. Is that dip just after...

I would love to know the thesis here. Is that dip just after July potentially due to the directors buying? Or is it a bit too early as that was in October. Either way there was a decent level of shorting when the directors were buying, I know who I back to be the better informed.

I notice the rise in shorting is only over the last two years. Could it possible be to do with people who think the revaluation isn't legit?