A number of flags on Boeing's stock (in black) and a couple that could be argued to be flags in yellow. https://s3-us-west-2.amazonaws.com/maven-user-photos/seanhyman/technical-analysis/IOSU6hIfr0e_ddd3b0bprg/LS4xmCZL5UG54rJRoty7iQ
By the way, this stock is also in a bubble. Look at a weekly, 10-year chart and you'll see. Not good!
Each quarter, the "big boys" in the market have to report their positions because they're so large. Once those reports are made public, it shows what stocks they're adding to or reducing their exposure in and what stocks they've recently bought or completely sold out of.