A “modified Bollinger Band” (mBB) buy signal is nearly upon us. It almost occurred today (Thursday, January 13th), but missed by a couple of points. We began to wonder how past sharp market declines lined up with the eventual mBB buy signal. Was the first signal successful, or did it take a number of probes before the market eventually bottomed. Was the mBB buy signal the bottom of the market, or did it continue on downward at a later time?