Facer,
what I am saying is that the nature of the market is different over the Christmas holidays from that which it is normally. This is born out by the changes in price. Normally, the share price will change 3 or 4 times a day (if that), but over the last few days it has changed 30-50 times a day by tiny amounts(according to my software). When normal trading resumes, there may well be a correction, just as there was from 80p in Sep. (when small punters joined in in response to a magazine article) to 64p in Oct., when normal trading conditions reasserted themselves. Progress in bringing Sativex to market then changed the reality, and the price rose substantially.
I happen to believe that this share is undervalued at the moment. Two years ago, when approval of Sativex was thought imminent the price was around 210p (and that was before we knew that Sativex was considered by the regulatory process to be safe). I would expect that the share should return to that sort of price in the near term. But I don't believe that it will get there in a straight line on the graph.