Tom - I am certainly no expert on ADX and ADXR, because I think all such indicators are BS, in the vast majority of cases lagging the obvious evidence of pure price action. However, I looked at Welles Wilder, Jr.'s, book, and Nextrend defines ADX and ADXR as he does, and uses the default period of 14 that he recommends. ADXR is supposedly a measure of trending. Wilder recommends trading if ADXR exceeds 25. Peaks and valleys of the ADX indicate turning points. Wilder's text is exceedingly subtle. I recommend that you look at the book if you want to use this indicator set. There is a brief discussion in Kaufman's "Trading Systems and Methods" if you have that. Please advise if you think I got any of this wrong. - Mike