Finding the Market Bottomby Larry Macdonald
"Nobody rings a bell at the bottom of a bear market", goes the old Wall Street adage, but there are plenty of indicators investors can monitor in the hope of divining when a bottom might occur. The key to judging this accurately is to avoid relying on one or two indicators. Instead, use several in combination because while some may be sending clear messages that the bottom is at hand, others may predict something else entirely; it's the degree of divergence between the indicators you examine that will help you determine where the market's headed.
Source: http://www.investopedia.com/articles/stocks/09/spot-market-bottom.asp; http://blog.canadianbusiness.com/category/larry-macdonald%22/; http://www.canadianbusiness.com/columnists/larry_macdonald/index.jsp