This One's Heating Up, That One's Cooling Off (RSOL, ABIO, ACYD, PRKR)

Last Thursday when I suggested American Community (OTCMKTS:ACYD) was a stock that should be shed immediately, and replaced with a position in Real Goods Solar, Inc. (NASDAQ:RSOL), I didn't win a lot of friends. After all, ACYD was the market's newest darling, in the middle of a red-hot runup, while RSOL was "just another solar name" that happened to be lucky enough to stumble its way above a key support line. Well, I hate to be the one to day I told you so, but, I told you so. American Community shares are down 35% since then, while Real Goods Solar shares are up 36% in the meantime. Both stocks seem pretty well entrenched in their current trends too.

I don't come hear to pat myself on the back, however. I come hear to let you know the same conditions that made American Community overbought and ripe for a reversal and suggested Real Goods Solar, Inc. was ready to rally are now saying - respectively - ParkerVision, Inc. (NASDAQ:PRKR) shares are due for a pullback and Arca Biopharma Inc. (NASDAQ:ABIO) is on the verge of a big bullish thrust.

As for ParkerVision, yes, it soared on Thursday and Friday of last week, on huge volume to boot. But, it may have been a little bit too much, too fast. There was so much volume behind the 118% surge from PRKR that there's really nowhere else left to go for stock. This morning's strong open looks like it just solidified the fact that there are no more buyers left at these lofty prices; we've seen nothing but selling ever since.

Arca Biopharma Inc., on the flipside, appears to be getting comfortable above a major line in the sand at $1.50. That level was a tough ceiling between June and September, but once ABIO fought its way above that level late last month, the resistance turned into support (and it's proven itself as a support line since then). Now the 20-day moving average line appears to acting as s support level too, suggesting the bulls are brewing up another pushoff from the newly-formed floor. But, this is a case where waiting for the breakout move may be too late.

As was the case with ACYD and RSOL, these aren't terribly long-term, fundamental-based calls on ABIO or PRKR. But, as was also the case with American Community and Real Goods Solar, the size of the likely short-term swings from ParkerVision and Arca Biopharma are too big to simply ignore or not capitalize on.

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