Take a look at the 1-year chart of Cepheid (Nasdaq: CPHD) below with the added notations:
CPHD has had a rough go of it over the past 5 to 6 months. However, since the low in October, the stock appears to have formed a double bottom (green) price pattern. The pattern is as simple as it sounds: Bottoming, rallying up to a point, selling back off to a similar bottom, and then rallying back up again.
As with any price pattern, a confirmation of the pattern is needed. CPHD would confirm the pattern by breaking up through the $38 resistance (red) that has been created by the double bottom pattern.
The Tale of the Tape: CPHD may be forming a double bottom price pattern. A long trade could be entered on a break above the $38 resistance with a stop placed under that level. Traders that are bearish on the stock could short the stock at $38.