Category:H2：修订间差异

Two legged pullback in a bull move, but it can also be a 2nd reversal up from a selloff, so variation of a double bottom.

The BPA system look at a double bottom as a H2 as well, however the fact that they both are called H2 can sometime lead to some confusions to beginner traders, making them think a H2 in a double bottom from a trading range has same probability of success as a H2 in a trend, but in reality, the H2 in a strong trend almost always has higher probability than a H2 in a DB[1].