RE:RE:SGY starting Re-test of 5 year lows now!Large BUY's placed at technical support levels which get filled easily are frequently Technical Short Traders covering and taking advanatge of volume and support/resistance. Canadian orders must be in even board lots. Short sellers are responsible for dividend charge-backs and any other distributions while they are short.
Watching Trades and Market depth in real time over some years and seeing stocks Short sold down to large BUY orders, often demonstrates repeated patterns and shows the hand originally held by the sellers. On stocks with large divys Shorts will tend to not doddle, lest they incur divy charges. i.e. covering earlier than later after a large drop in price is wiser than squeezing every last penny out of a short but incuring charge backs.
Not a firm science spotting Short covering by any means, but rather the result of careful watching and analysis over time.