--- title: "Williams Accumulation/Distribution" description: "Larry Williams' cumulative line that compares each close with the prior close and the bar's extremes to judge accumulation or distribution. Unlike the..." canonical: https://www.getswoopr.com/indicators/momentum/williams-accumulation-distribution/ source: "Swoopr Investment: https://www.getswoopr.com" --- ## Direct Answer > Larry Williams' cumulative line that compares each close with the prior close and the bar's extremes to judge accumulation or distribution. Unlike the volume-based accumulation/distribution line, it uses price alone. A rising line means closes are repeatedly finishing above the prior close and being credited as accumulation; a falling line indicates distribution. # Williams Accumulation/Distribution: Formula, Meaning, Signals, Examples and How to Use It ## How Is Williams Accumulation/Distribution Calculated? Larry Williams' cumulative line that compares each close with the prior close and the bar's extremes to judge accumulation or distribution. Unlike the volume-based accumulation/distribution line, it uses price alone. **Formula:** `If Close > prior Close: AD = Close - min(Low, prior Close); if Close < prior Close: AD = Close - max(High, prior Close); else 0. WAD = running sum of AD` **Inputs:** - High, low and close of each bar - Prior close - The running total from earlier bars **Worked example.** A bar closing at 104 after a prior close of 100, with a low of 99, adds 5.00 to the running total. The inputs are illustrative numbers, not market data. **Reading it.** A rising line means closes are repeatedly finishing above the prior close and being credited as accumulation; a falling line indicates distribution. Divergence between the line and price is the main way it is read. **Limits.** Because the line is cumulative, its level depends on the starting point and only its direction and divergences matter. It ignores volume, so a large and a small move in the same price range count equally. ## What is Williams Accumulation/Distribution? Larry Williams' cumulative line that compares each close with the prior close and the bar's extremes to judge accumulation or distribution. Unlike the volume-based accumulation/distribution line, it uses price alone. ## How to use Williams Accumulation/Distribution A rising line means closes are repeatedly finishing above the prior close and being credited as accumulation; a falling line indicates distribution. Divergence between the line and price is the main way it is read. A reading alone is never a buy or sell signal; it needs context from price structure, volume, volatility and the broader market regime. ## Strengths - Comparing the close with the true low or true high relative to the prior close brings gaps into each day's accumulation or distribution value. - As a cumulative line it can be set against price to see whether new highs and lows are echoed by the line's direction. - Reproducible when the formula and data convention are fixed. ## Weaknesses and limitations - Each day's contribution is in price units, so the line's slope is tied to the instrument's price scale and is not comparable across instruments. - A close equal to the prior close adds zero whatever the range, so a wide inside day with no net change leaves the line unchanged. - Correlated indicators can create false confidence by repeating the same underlying information. ## Editorial and risk note This page is educational content, not individualized investment advice. It should not imply guaranteed prediction, accuracy or outperformance. ## Frequently Asked Questions Is Williams Accumulation/Distribution a buy or sell signal? No. A rising line means closes are repeatedly finishing above the prior close and being credited as accumulation; a falling line indicates distribution. Because the line is cumulative, its level depends on the starting point and only its direction and divergences matter. A trade built on it still needs a trigger, an invalidation rule, a position size and realistic execution assumptions. What is the best setting for Williams Accumulation/Distribution? Williams Accumulation/Distribution takes these inputs: high, low and close of each bar; prior close; the running total from earlier bars. There is no universal best setting for the tunable ones, so test them across instruments, regimes and out-of-sample periods and favor stable parameter regions over one historical winner. Can Williams Accumulation/Distribution be used by itself? Because the line is cumulative, its level depends on the starting point and only its direction and divergences matter. It ignores volume, so a large and a small move in the same price range count equally. For that reason it is read next to measures of direction, participation, valuation, liquidity and risk, not alone. Does Williams Accumulation/Distribution work on every timeframe? The calculation can be run on any bar size, but behavior is not portable: a reading on a five-minute chart describes a very different market window from the same reading on a daily chart. Validate the exact timeframe before relying on it. Why does Williams Accumulation/Distribution give false signals? Each day's contribution is in price units, so the line's slope is tied to the instrument's price scale and is not comparable across instruments. A close equal to the prior close adds zero whatever the range, so a wide inside day with no net change leaves the line unchanged. Lag, noise and regime changes add to this, because market participants react to new information after the reading is calculated. How should Williams Accumulation/Distribution be backtested? Rebuild Williams Accumulation/Distribution from high, low and close of each bar using point-in-time data, write the rules before testing, include delisted securities where relevant, model realistic fills and costs, reserve a validation sample and compare with a simpler baseline. S Swoopr Editorial Team The Swoopr Editorial Team produces independent investment education, research, and tools for understanding markets, evaluating opportunities, and managing risk. All content is educational only and does not constitute personalized investment advice. See our [editorial policy](https://www.getswoopr.com/legal/editorial-policy/) and [corrections policy](https://www.getswoopr.com/legal/corrections-policy/).