Hi cmlee,
To put it simply,when a stock hits a particular level without being able to take it out,that level is termed resistance.When that resistance is taken out,it's called a breakout.Now this breakout should hold this particular resistance level which has now become its support.If prices pull back to support and then breaks through it and falls,this breakout is now a false breakout.This false breakout is also called as BULL TRAP.
The Bull Trap is a failure pattern..........not only is it time to sell your long position,it also is time to short some.Vice versa with a bear trap.
All the best!
Saint