ADX
Average Directional Index — trend strength + ±DI.
What it is
Average Directional Index — trend strength + ±DI.
ADX, also from Wilder (1978), measures the strength of a trend without saying anything about its direction. It is built from two directional indicators: +DI (the positive directional indicator) and −DI (the negative one). ADX itself is a smoothed average of |+DI − −DI| / (+DI + −DI).
Typical reads: ADX below 20 = ranging market, ADX above 25 = trending, ADX above 40 = strong trend. The companion +DI / −DI lines are used to read direction — +DI above −DI means the trend is up.
ADX is widely used as a regime filter: only run a trend-following entry rule when ADX is above some threshold. It is slow by design — the default 14-period smoothing means it confirms trends rather than predicting them.
DX = 100 · |+DI − −DI| / (+DI + −DI) ADX = Wilder-smoothed(DX, N)
Read the full Average directional index (ADX) definition in the glossary →
Live chart
BTC/USDT on Binance with this indicator pre-loaded. Powered by TradingView.
Chart by TradingView. Built-in study shown for illustration; the Noon Barbari engine computes its own values.
Parameters
| Parameter | Default | Range |
|---|---|---|
| Period | 14 | 2 – 200 |
Output fields
The named values this indicator exposes to your entry and exit rules.
Related strategies
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