Anchored VWAP vs Accumulation/Distribution
Anchored VWAP averages price weighted by volume from a chosen starting point, so its output is an actual price. The accumulation/distribution line accumulates each bar's volume scaled by where the close sat within that bar's range, so its output is a cumulative total with no price units.
Both of these combine price and volume, and they combine them for different purposes. One is trying to produce a fair level; the other is trying to produce a running verdict on whether buyers or sellers were in control.
What each one is
Anchored volume-weighted average price averages price weighted by volume from a starting point you choose, producing a single line at an actual price. Anchored VWAP covers it.
The accumulation/distribution line takes each bar’s volume and scales it by where the close sat inside that bar’s range, then adds the result to a running total. Accumulation/distribution covers the calculation, and the OBV indicator covers the cruder version of the same idea.
One outputs a price and the other a tally. Whereas the anchored average can be rested against directly, the accumulation line’s value depends on when the sum began and means nothing on its own.
Where they differ
Whether you get a number you can trade. The anchored average is a price — you can buy at it, stop beyond it and size from it. The accumulation line is a cumulative figure whose absolute value would be different if the chart had loaded more history.
How each treats a single bar. The anchored average weights every traded price by the volume there. The accumulation line looks only at where the close sat between the high and the low, so a bar closing at its high contributes its full volume and one closing dead centre contributes nothing at all — regardless of how much traded.
Where the judgement sits. The accumulation line has no settings — it is fully determined by the data. The anchored average requires you to choose a starting point, and a different anchor gives a completely different level.
What each claims. The anchored average claims only that a volume-weighted average since an event is a level participants care about. The accumulation line claims that close position within a bar reveals who was in control, which is a much stronger claim and a contested one.
Where they agree
Both need trustworthy volume. Neither works on spot foreign exchange, where there is no consolidated tape and the figure is one venue’s flow.
Both are backward-looking and neither leads price in any sense that survives inspection.
Both cost a round trip when acted on — 0.0098 on this site’s shared series, about 2% of the median bar range of 0.493.
And both are weakened by ranges. Direction runs here average 2.01 bars with a longest of 11, which flattens the tally and makes the level something price crosses repeatedly.
Which one to use
Use the anchored average when you need a level. Anchored to a gap, an earnings release or the start of a move, it names the average price paid by everybody who has traded since — a shared reference that can carry an order.
Use the accumulation line when the question is whether the move has backing. Price rising while the tally falls says the closes are not near the highs, which is a genuine warning that no price-only tool produces.
Use both, since they overlap very little. One supplies the level and the other supplies the context, which is a real division of labour rather than two readings of the same thing.
And when volume on your instrument is unreliable, use neither. Both are built on a figure that must be real, and both fail silently when it is not.
Why the close-position weighting matters
Because it makes the tool ignore a whole category of bar. A wide, heavily traded bar that closes in the middle of its range is one of the most informative things a market produces — genuine two-way conflict — and the accumulation line records it as approximately zero.
And because a thin bar closing at its extreme counts in full. On this series the ninetieth percentile bar range is 1.101 and the largest was 2.338, so a small quiet bar and an enormous contested one can contribute in ways that invert their real significance.
The original data
Of the 24,971 unique videos in the search corpus, no title compares these two directly. Anchored volume-weighted average price appears in 29 titles at a median of 14,972 views across 27 channels. The accumulation/distribution line appears in 19, at a median of 14,144 across 18.
Both under thirty videos, both near a fifteen-thousand median. These are two of the least-covered volume tools measured here and two of the better-watched, which is the clearest signature of an under-served subject in the corpus — almost every channel that covered either did so once.
On the chart above the disagreement is the information. A good level with deteriorating participation is precisely the case where running one tool without the other would mislead you.
When it fails
The characteristic failure is reading a divergence on the accumulation line as a forecast. The line falling while price rises is a description of where closes sat inside their bars, and there are ordinary reasons for it — a series of bars closing mid-range during a steady advance produces exactly that picture without anything being wrong. Most divergences resolve by the indicator catching up rather than by price turning, and because the ones that precede a reversal are memorable and the many that do not are forgotten, the technique feels far more reliable than it is.
A second failure is anchoring the weighted average arbitrarily, which produces a level about an arbitrary group of trades.
A third is treating the accumulation line’s absolute value as meaningful, when it depends on the chart’s start date.
A fourth is using either on spot foreign exchange, where the volume figure is one broker’s.
And a fifth is expecting the accumulation line to register a wide two-way bar, which by construction it does not.
Related
Anchored VWAP covers the level and the anchor choice. Accumulation/distribution covers the close-position weighting. And the OBV indicator covers the simpler cumulative volume tally.
The accumulation line’s weighting is the part worth knowing: a bar that closes exactly in the middle of its range adds nothing at all, no matter how much traded. That is a deliberate choice and it makes the tool quiet in exactly the conditions people most want it to speak.
— Michael Whitman
This page is educational, not financial advice. Test every idea on your own charts before risking money.