Published on: June 17, 2025
Technical analysis is rich with indicators, but one of the most respected tools for identifying the strength of a trend, regardless of direction, is the ADX (Average Directional Index). Understanding ADX and its components can significantly enhance your trading decisions if you are a swing trader or a long-term investor.
What is ADX?
The Average Directional Index (ADX) is a trend strength indicator developed by J. Welles Wilder, the same mind behind the RSI and Parabolic SAR. ADX does not indicate trend direction; it tells you how strong a trend is.
ADX values range between 0 and 100:
0–20: Weak or no trend
20–40: Emerging trend
40–60: Strong trend
Components of ADX
The ADX indicator is composed of three lines:
ADX Line (Average Directional Index) – Measures the strength of a trend.
DI+ (Positive Directional Indicator) – Measures the strength of upward movement.
DI- (Negative Directional Indicator) – Measures the strength of downward movement.
How to Read It:
When DI+ > DI-, bulls are stronger – Bullish.
When DI- > DI+, bears dominate- Bearish.
When ADX is rising, the current trend (either up or down) is gaining strength.
When ADX is falling, the trend is losing strength or entering a range.
ADX Across Different Chart Types
Let us explore how ADX can be interpreted using various chart types, each offering a unique lens for market behaviour.
1. Candlestick Charts
Candlestick charts are the most widely used. When used with ADX:
Rising ADX above 20 with DI+ above DI- = Bullish trend.
Rising ADX above 20 with DI- above DI+ = Bearish trend.
Flat ADX below 20 = No clear trend; best to avoid.
2. Point & Figure Charts
Point & Figure (P&F) focuses solely on price movements and ignores time.
Combine ADX with P&F breakouts:
A breakout with ADX > 15 often signals a sustainable move.
Low ADX can signal false breakouts or sideways price action.
3. Heikin Ashi Charts
Heikin Ashi smooths price data to better visualise trends.
A sequence of same-color candles (no wicks in one direction) + rising ADX = strong trend.
If HA candles flip but ADX keeps rising, be cautious of trend continuation.
Falling ADX on HA candles with wicks on both ends = trend exhaustion or reversal.
Deciding the Trend with ADX
Here is a step-by-step guide to determine trend direction and strength using ADX:
Step 1: Check ADX Value (based on chart types)
Step 2: Compare DI+ and DI-
If DI+ > DI-: Trend is bullish
If DI- > DI+: Trend is bearish
Step 3: Look at the Slope of ADX
Rising ADX: Trend is strengthening
Falling ADX: Trend may be weakening
Step 4: Match with Chart Patterns
Validate breakouts, pullbacks, or reversals with ADX strength.
Stay in sync with the trend and ADX for a better success ratio.
Using RZone: ADX Scanner for Quick Trend Detection
If you are using the RZone platform, you are in luck; there is a ready-made scanner for ADX-based trend identification.
To scan, go to Indicator Digger > ADX
Features of RZone ADX Scanner:
Scans stocks on various Chart Types
Scans stocks on various Time Frames
Scan across various Groups
Sample Use Cases:
1. Find strong uptrending stocks with by sorting based on ADX, DI+ and DI- levels
2. Spot potential shorting opportunities with ADX and DI trends
3. Identify range-bound stocks with low ADX for mean-reversion or Short Options strategies.
Summing Up
The ADX indicator is a powerful tool when used correctly. It doesn’t tell you the direction of the market, but it gives a crystal-clear view of how strong the trend is, something every trader needs. Combined with visual chart types like Candlesticks, Heikin Ashi, or P&F trading strategy.
