The primary indicator that Cook uses is the “Cook Cumulative Tick,” a proprietary measure he created in 1986 that uses the NYSE Tick in conjunction with stock prices. His indicator alerted him to the 1987, 2000, and 2007 crashes. The indicator also helped to identify the beginning of a bull market in the first quarter of April 2009, when the CCT unexpectedly went up, turning Cook into a bull.
What does Cook see now? (more)