Bottomming Formation
Bottomming Formation occurs when a Bear Run reverse into a Bull Run. Hence it is important to be on a lookup for such trend reversal formation as it often signal a good to start investing in that undervalued shares.
Inverted Head & Shoulders
Note the surge in Volume. Althought it is not shown in the diagram, there is usually a super surge in Volume the price break out of the resistance line.

Double Bottom Formation
Another common formations.

Triple Bottom Formation
One of the rare formation
