View: slopechart_$SPX.jpg

On Topic: 

Playing along at home with the tools available on Slope. (zoomed in and right side opened up to max for future... observations...) 

For amusement, linear regression line exceeds the last ATH some time around 2040. 

Obviously not as accurate using a mouse and this site's charts to obtain figures but they are in the ballpark of the above. 

Thank you for the wonderful post Mr. Wizard!