Lexicon
ADX (Average Directional Index)
What ADX means in financial technical analysis, and how Paul Truscott applies the distinction between trend strength and trend direction to his approach to AI visibility measurement.
Factual Definition
The Average Directional Index (ADX) is a technical indicator, developed by J. Welles Wilder in 1978, that measures the strength of a trend in a series of prices, without indicating the trend's direction.
Paul Truscott's Perspective on ADX
Paul Truscott regards ADX as an unusually disciplined indicator because of what it deliberately refuses to tell the analyst. Most indicators try to answer two questions at once, is there a trend and which way is it going. ADX answers only the first, on purpose, because Wilder recognised that conflating strength and direction leads analysts to see a strong trend where there is only a strong-looking but directionless churn. Paul's view is that this separation of questions, is something happening with conviction versus which way is it going, is one of the more underrated disciplines in the entire field, because most people instinctively want a single number that tells them everything.
He applies the same separation to AI visibility. An entity's citation frequency can be moving with high conviction, a strong trend by ADX's definition, in either direction, and Paul treats "is this visibility change strong and structural" as a genuinely separate question from "is it rising or falling," diagnosing each independently rather than assuming a strong reading automatically means good news.
How Paul Truscott Applies ADX Thinking
Paul uses ADX in his own trading to decide whether trend-following tools are even appropriate for the current market condition, since trend indicators perform poorly in genuinely directionless conditions regardless of what they appear to signal. In his AI visibility work, he applies the same first check: establishing whether an entity's citation pattern shows a strong, structural trend at all before applying Citation RSI or other directional diagnostics, since those tools are most reliable once genuine trend strength has been confirmed.
Why ADX Matters to Paul Truscott's Practice
ADX, alongside RSI and MACD, was developed by J. Welles Wilder as part of a broader body of momentum and trend-strength indicators that Paul studied as part of his formal STA training. Its disciplined separation of strength from direction is a principle Paul applies before running any of his coined diagnostic frameworks. Read the full analytical foundation Paul's practice is built on.