Thanks for the clarification about the price/time scales that Gann might have used, DD. It's been my impression that Gann's methods (in some particulars, at least) were not known to be fully understood. Perhaps you could write the definitive book on the subject! Re my own trading preferences, I'm not currently inclined to make the effort required to implement price/time methods. Different traders have different preferences concerning trading methods. Having tried various methods over several years, my preference happens to be S&R (including related aspects of RSI). As I've said, identifying areas of support and resistance is pretty straight forward and yields reliable results, and that "grass" has been green enough for me.