Highs on 9/4 at $608/share served as a future resistance level for UNH which it has struggled to rally past in the latter half of the year. The stock came close to testing the levels on 10/2 and 10/14, but failed both times. Lately the stock surpassed these levels on 11/8 and 11/27, but still has struggled to hold on to more gains past this level.
After a third gravestone doji candle in a row occurred on 12/4, the stock began a tight descending channel decline, finding support in a doji from 12/17.