Guideposts to a deeper pullback

Mid-week market update: The S&P 500 hasn't seen a 2% pullback since the rally off the November bottom, but is a deeper pullback starting? Stephen Suttmeier at BoA wrote that the index is testing an initial objective in the 5200s, with further upside in the 5600s. This would be an ideal spot for the market to pause. 
 Here are some guideposts to a deeper pullback.
  The full posts can be found here.