KEY POINTS
  • A "head-and-shoulders" pattern, which could signal a temporary market top, could be forming in the S&P 500.
  • The pattern looks to be building just days after the S&P 500 chart flashed another scary pattern— a death cross.
  • One strategist said if the head and shoulders forms, it could mean a sell-off down to 2,300.
Traders work on the floor of the New York Stock Exchange.

The chart of the S&P 500, which flashed a scary death cross last week, now appears to be forming a new pattern that could be just as ominous.

The S&P has been forming a "head-and-shoulders" pattern, where the right shoulder seems to be building in the index's recent monthly range of 2,600 to 2,800. The top of the 'head' was when the S&P 500 hit 2,940 in late September. The neckline has been forming in the 2,600 area.