Category:DB：修订间差异

Double Bottom, 双底。Two consecutive bars with identical lows. Every DB is a [[:分类:H2B|H2B]], and every H2B is a DB, either term is always correct. '''If two strong selloffs that reverse up, or two strong reversals up, call it a DB'''. If '''one selloff''', but 2nd buy signal, like 2nd reversal up from below of LOY or support, call it a H2B. If a selloff tries to reverse twice, it is a H2B; if a 1st selloff fails and bear trend resumes, a 2nd reversal up is a DB. '''A H2B is just a small DB''' (usually less than 10 bars).