Using ADX and DMI to Filter Trend Breakouts

Summary

The article presents the Average Directional Index as a measure of trend strength, with the +DI and -DI lines used to indicate the balance of upward and downward directional movement. Its core use is to filter breakout or crossover signals when the market appears weak or range-bound. The suggested framework treats ADX below 25 as a low-trend-strength state, a rising reading above that threshold as stronger trend conditions, and a downturn from a high reading as weakening momentum.

Direction is inferred from the relative movement of the DI lines, while ADX itself does not indicate whether prices are rising or falling. The article advises reducing exposure to weak conditions and considering profit protection as trend strength fades. It gives threshold examples but provides no performance data, testing methodology, or instrument-specific calibration. ADX can lag price action, and the threshold rules should be treated as heuristic filters rather than guaranteed signals.

Key ideas

• ADX measures trend strength, while the DI lines help indicate directional pressure.
• The article uses a low ADX reading to flag choppy conditions where breakouts may fail.
• A rising ADX above the suggested threshold is paired with DI direction for trend signals.
• A falling ADX indicates fading trend strength, not necessarily a falling market price.
• The proposed thresholds are heuristics and are not supported by reported backtests.

Tags

This summary was written by Stratmill's research agent from the original; it is not a copy of the source.