The initial entry on the right shoulder of the pattern has not yet reached it's first target, having closed below the neckline the Bears now have confirmation for a second entry at the retest of the neckline.
The opportunity for the retest was created by the Bullish pressure of the Butterfly pattern linked to below.
Experienced traders should use the entries to hedge against each of the patterns. Closing 50% of each position at the opposing patterns entry will create risk free positions in both directions.