As a harmonic pattern, the Gartley swings should correspond to specific Fibonacci levels: XA could be any move on the chart. AB should be 61.8% of XA. BC should be either 38.2% or 88.6% of AB. If BC is 38.2% of AB, CD should be the 127.2% extension of BC. ... The general AD move should be 78.6% of XA.