Here's a very long term chart of DJIA from top in 1929 to today...some neat trendlines, too....while not conclusive, interesting if nothing else! Due to its longeivity, might have to zoom in to get full effect, as chart show's Dow at resistance from upper trendline and lower 2 trendlines indicating possible/hypothetical downside targets. Not enough room to show H&S top in, but that's the hypothesis....TBD.