Butterfly Rules
AB retraces 78.6% of the XA leg
BC can retrace between 38.2% – 88.6% of AB
CD can be an extension of 1.618% – 2.618% of BC
CD can also be an extension of up to 1.272% – 1.618% of XA leg
The point D is known as the PRZ or Potential Reversal Zone