Can't explain the recent rise in AVR, who make a new type of heart valve.  From a low of $4.25 on 5 February to an intraday high of $7.60 today.

I lost patience as trials slowed because of covid.  It has a very checkered history of continual capital raises and consolidation of shares.

There has not been any new significant news as far as I can tell.  I don't think the new presentation would be enough to cause such a price pop.

I keep setting a higher price alert thinking it couldn't possibly get there anytime soon and it keeps going off (annoyingly as I don't hold it anymore!) and I keep reseting it.