This is the same as a previous posting, but instead I'm using Google Spreadsheets to see if it will be easier to update the data.
The Dow Jones Industrial average (^DJI) is scaled from 1929 by 14000/400. Day "zero" corresponds to October 24, 1929 and Oct 7, 2008.
Update: August. 1, 2015: I learned an important lesson from this post. I can't and shouldn't try to predict the future.
Update: Feb. 12, 2010: Scale Time Axis for 1929 (see Market Oscillations)
Added Sept. 23, 2010, 100-day moving average and 1987 Crash data.
Update May 3, 2013, New chart type
Earth 2.0: What Would Our Economy Look Like?
2 days ago