Using a trendline extending from 1932 on the log scale -

Using a trendline extending from 1932 on the log scale

-784 points loss after the Tech bubble of year 2000
-900 points loss after the mortgage chrisis of 2008
... Mean average of both is 846 points


3025 - 846 = 2179 is support level for SPX

Angle for both crashes

41 degree angle for year 2000 + 61 degrees angle for year 2008
Mean average of both is 51 degrees