"1-2-3-4" - Reversal Pattern ( Price Action Trading )
1. TL is broken.
2. PA failed to make HH ( for Sell ) or LL ( for Buy ).
3. BO of 2 ( confirmation that the trend is changed ).
Learned from here : http://lordicescurrencytrading.blogspot.in/2012/04/1-2-3-4-reversal-pattern-formation.html