I would call that drop below 2200 meaningless, that's nothing like 1987 or 1928 or 2008-2009. Even tbouth is looks comparable to those lines on the chart.
Right now, there is an imposed similarity between between '29, '87, and '08, in the OP's post. If you subscribe to the similarities (which the OP did not even endorse??), the implication is clear. "YMMV." The last time I looked at The Great Depression in depth, what got glued into my brain was that there was not *one* drop, but 3 -- being '29, a near-recovery, then '30, and then '31. Things basically stayed flat until the early build-up to WWII ('37'38'39, when IBM and Remington stopped making sewing machines and type-writers, and started making M1 Garands and Mosin-Nagants (for the damn Ruskies...! Big money collectors' items now.)..And ships out the Wazoo... Ooops: the point is, that the OP's graph (for 'journalistic purposes'...) does not show the end of The Depression. Does that make the graph any less interesting? No.
The Y axes were arbitrarily chosen to make the graphs look identical. The X axis makes no sense. In a nutshell, these comparison graphs are worthless. You can make them tell any story you want simply by changing the scale of the axes.
Whoa, sorry guys, when I said looks like a buying opportunity based on that chart I was looking on my phone and didn't see the 2018 ended only about a third of the way down the big drop. Definitely not a bullish looking comparison!
Making an argument for the future is kind of meaningless -- and also basically just gambling. People will always just roll their eyes as you speak about your crystal ball. And besides, and more importantly, it's only fun and sexy talking about your current and past trades that have a realized gain/loss.
Typical loser mentality .. the guy took the time to post an logical observation & that`s your best rebuttal? I guess PTJ holding the 29 template up to 87 chart was useless as well?