Directional Indicators

ADX — Average Directional Index

How to determine trend strength, filter signals, and use ADX in trading strategies.

7 min readUpdated: 2026-03-27

What is the ADX indicator?

ADX (Average Directional Index) is a popular technical analysis tool used to measure the strength of a trend.

The indicator does not show direction, only the strength of the current trend — whether bullish or bearish.

It is usually calculated over a 14-period moving average but can be applied on any timeframe.

How to use ADX

ADX ranges from 0 to 100. The higher the value, the stronger the trend.

  • ADX below 20 — no trend (range market).
  • ADX crossing 20 — a new trend is forming.
  • ADX 20–40 — trend confirmation.
  • ADX above 40 — strong trend.
  • ADX above 50 — very strong trend.
  • ADX above 70 — rare extreme trend.
ADX indicator example
ADX indicator example

Platform Settings

ADX parameters can be configured by period, threshold, and timeframe. It can be used as an entry signal or as a trend filter.

Strong trend — above 25 | Weak trend — below 25

ADX settings
ADX settings
  • Timeframe: recommended from 1h and above.
  • Trigger Action: TREND_STRONG or TREND_WEAK.
  • ADX Length: default 14 (also 12, 18, 21).
  • ADX Threshold: typically 20–26.
  • Indicator mode: Cross_only, Trend_Filter, Trend_for_buy.

Advantages and Disadvantages

AdvantagesDisadvantages
Measures trend strength.May generate false signals.
Helps identify entry and exit points.Lagging indicator.
Can indicate overbought/oversold conditions.Limited market context.

Combining with Other Indicators

1. ADX + EMA

EMA shows direction, ADX confirms trend strength.

  • Logic: ADX filters false EMA crossovers.
  • Entry: EMA crosses up + ADX above 25 and rising.
  • Exit: ADX declines from high levels.

2. ADX + Oscillators

  • ADX < 20: range market — oscillators work best.
  • ADX > 30: ignore counter-trend signals.
  • Use: entries on pullbacks.

3. ADX + Support/Resistance

  • True breakout: ADX rises with breakout.
  • False breakout: ADX remains low.

Decision Matrix

ADX StateIndicatorTactics
Rising (25 → 50)EMA / LevelsTrade with the trend
Falling (from 40+)RSI / StochasticTake profits
Low (<20)OscillatorsRange trading

Practical Tip

Do not use ADX alone for entries. Use it as a filter:

  • Check ADX (is there a trend?).
  • Check EMA (direction).
  • Use oscillator/pattern for entry timing.