Strategy – Double Bottoms and Bollinger Bands
A common bollinger band strategy involves a double bottom setup.
The initial bottom of this formation tends to have substantial volume and a sharp price pullback that closes outside of the lower bollinger band. These types of moves typically lead to what is called an “automatic rally.” The high of the automatic rally tends to serve as the first level of resistance in the base building process that occurs before the stock moves higher.
After the rally commences, the price attempts to retest the most recent lows that have been set to test the vigor of the buying pressure that came in at that bottom.
Many bollinger band technicians look for this retest bar to print inside the lower band. This indicates that the downward pressure in the stock has subsided and there is a shift from sellers to buyers. Also, pay close attention to the volume; you need to see it drop off dramatically.
Below is an example of the double bottom outside of the lower band which generates an automatic rally. The setup in question was for FSLR from June 30, 2011. The stock hit a new low with a 40% drop in traffic from the last swing low. To top things off, the candlestick struggled to close outside of the bands. This led to a sharp 12% rally over the next two days.