It's been a long time since I've taken a look at my 1937-1942 analog. Part of the reason is that the big POMO push seemed to have made the analog to longer relevant. I'm not entirely convinced.
For what it's worth, here is a view of the 1937-1942 market, with colored markers showing various turning points.
Here, for contrast, is the 2007-present market with similar markers. Note that the y-axis is scaled differently, so they don't line up, but by following the colored markers, you should get a sense as to what I'm suggesting.