In addition to the Doji pattern that appeared in the longer term chart of the S&P 500, weekly Dojis also appear in the chart patterns of Broadcom BRCM -0.02% , Wal-Mart WMT -0.03% , J.P. Morgan Chase JPM +0.21% and Norfolk Southern NSC +0.70% . Uniquely, the Doji for NSC appeared the week before last, and it was followed by a negatively engulfing red candle. That made it a bearish reversal Doji and a bearish indicator.