Some of the stocks I bought last week are up thirty to forty percent. Some of them are "keepers", but some were simply opportunistic. AEM is an example of the latter.
Interpreting gaps is a weak area for me, but my inclination is to sell at this point, given that the gap has indeed been filled. I suppose the stock might have more upside, but given my belief that stocks will start selling off hard around Thursday, I'd rather be safe than sorry.