Comcast stock historically has not made big runs from breakouts. That's not to say that CMCSA stock doesn't have good years.

    Comcast (CMCSA) stock rose 32% in 2019, trading mostly in line with the S&P 500. But in 2020, Comcast stock underperformed when compared with cable peers Charter Communications (CHTR) and Altice (ATUS).

In 2021, CMCSA stock has climbed nearly 3% as of Nov. 5. Comcast stock has retreated from its 52-week high of 61.80 set on Sept. 2.