OK, I'm no "expert" here, but this is how I play the game, even where I'm long:
I have preset buys. They are usually around the 10, 20 and 50 SMA, with other factors influencing. When the PRs come out, they do 1 thing: they escalate the price in the short term. (mainly because they bring out the flippers and shorters). During this time and dependent upon the spike, I either sell off a small position, which I buy back when the dip comes, or I set an even higher profit taking position. (Scottrade will only let me set a limit based on a percentage of the current PPS, so I have to do this during a spike in order to get it wayyyyy up there).
The PPS will try to hold an average (Bollinger Bands 20), so one can play the numbers to a certain extent.
I do not consider someone to be a "flipper" who takes a small profit so they can reinvest it again in the same stock, but with more shares this time. (I wish I could show you how I'm flipping another puppy right now. Talk about abusing a stock...........) Anyway.....
Doing this, I have increased my position in share amount, but not necessarily in dollar amount.
So, when I see a spike coming, either from an issued PR or from a rumor, I expect to see a dip coming, because I'm assuming there are longs who need to take profits in order to increase their positions LONG TERM.
Take a look at all of these other companies that have gone ballistic. Where are most of them now? No bid? Hmm. Wonder why? The one I'm currently playing is surely gonna be a no bid, Everyone is abusing it. (BTW, 1000% gains on NO PRs, No issuances or guidance from company, No financials Imagine that?)
Anyway, I'm all done posting again. Did more than I planned or wanted to. As I have always said: Have a plan, work your plan. It's your money, you do with it what is right for YOU. Best of luck.