With one day to go before a possible U.S. Government "Shutdown" here is the picture of the Dow Jones Stock Market. Also, a snapshot of the 1929 Great Depression.
The Stock Market bottomed on March 6, 2009, and the longest "boom" period the U.S. has experienced since circa 1846 is 10 years, 0.0 months that indicates that around March 6, 2019, if a recession hasn't already began, that an economic turndown most likely will be in the works.
Blue lines are not "exactly" horizontal but you understand the meaning.