SPY 15 min chart - head & shoulders?

The SP 500 15 minute stock chart could be setting up a head and shoulders formation. If this were the case, we would see the right shoulder at $150.69 and a retracement to the neckline $149.40. The height of the head, as measured from the neckline to the head, is our target for the plunge below the neckline. That would have the ETF SPY at $147.75