What you see is the Market makers and hedge fund traders flushing out stop losses placed by nervous investors. They are selling shares between themselves to lower overall prices. Nervous investors seeing the steady but slowly dropping share prices place stop loss orders which get flushed out the next day. At the end of the day the MMs buy into the available shares at lower prices almost up to the opening price of the day.
In other words, they are trying to scare us into selling before the results come in which they anticipate are going to be good.
Well, that may be true and I am longer than anyone but to play devils advocate, it is possible the shorts are shorting shares and banking against good news and then letting it rise to give the impression that all is well and not to take in down too far so they can bring it back up to short more shares. There are no guarantees here. That being said...I am still long.