ADX

Since many experts feel that ADX is a measure of market strength, and might indicate if the current market is in a trend or range, traders set the input on this to alert them when the market exceeds that amount. Below that amount is considered normal, while above it is considered a "trend" day. The tool comes defaulted with an input of 30 for the S&P. This helps advise the trader when they should be looking for a “continuation” of a move, trade, rather than a market "reversal" trade.