ARTICLE SYNOPSIS ...The TD Range Expansion Index (TD REI) by Thomas DeMark Here, the author of The New Science of Technical Analysis and the brand-new New Market Timing Techniques explains how to use the TD REI and the TD Price Oscillator Qualifier. Throughout my 26-year career in the investment business, I have studied and tested many widely followed market timing oscilla-tors. Overall, I have questioned their construction, ambiguous in-terpretation and discretionary application. Consequently, I have developed my own series of indicators, and to simplify their application, I have assigned to them an objectiv...