Can you provide some dated historical context of how charts and data can help identify lower probability or bearish periods?
Below is an excerpt from a February 2008 article that warned of the stock market's deteriorating risk-reward profile. The day the article was published the S&P 500 closed at 1,367. The bear market did not end until the S&P hit an intraday low of 666 in March 2009:
The entire 2008 article "Technical Breakdowns May Call For More Hedging" can be found here.