A two-step pattern can also be called a Gartley pattern, depending on
the ratios that show up within it. The definition of a Gartley pattern is a
bit more specific in terms of the ratios that show up within the pattern.
For this reason, not all two-step patterns will fit the definition of a Gartley
pattern, although all Gartley patterns are considered to be two-step patterns.
(For more information on the Gartley pattern, check out Fibonacci Ratios with
Pattern Recognition by Larry Pesavento.)