ADX: The Trend Strength Indicator FACEBOOK TWITTER LINKEDIN By CANDY SCHAAP Updated Sep 17, 2020 Trading in the direction of a strong trend reduces risk and increases profit potential. The average directional index (ADX) is used to determine when the price is trending strongly. In many cases, it is the ultimate trend indicator. After all, the trend may be your friend, but it sure helps to know who your friends are. In this article, we'll examine the value of ADX as a trend strength indicator. Introduction to ADX ADX is used to quantify trend strength. ADX calculations are based on a moving average of price range expansion over a given period of time. The default setting is 14 bars, although other time periods can be used. 1 ADX can be used on any trading vehicle such as stocks, mutual funds, exchange-traded funds and futures. ADX is plotted as a single line with values ranging from a low of zero to a high of 100. ADX i...