What is Anchored VWAP? Definition, Formula, and Example
Anchored VWAP (AVWAP) is the Volume Weighted Average Price calculated from a user-specified anchor point — such as an earnings date, IPO, or major price pivot — rather than the session open, producing a multi-day cost-basis line that identifies where groups of participants entered the market.
What Is Anchored VWAP?
Anchored VWAP (AVWAP) computes the Volume Weighted Average Price starting from a user-selected price event rather than the daily session open. By anchoring to a meaningful moment — an earnings release, a breakout pivot, an IPO date, or a major swing high or low — traders produce a continuous cost-basis line representing the average price paid by every participant who bought or sold at or after that event. The line answers a precise question: where are the participants who entered since this anchor point at breakeven?
Formula
AVWAP uses the same calculation as standard VWAP but the cumulative sums begin at the anchor candle and accumulate forward:
AVWAP(t) = Σᵢ₌anchor^t (Typical Priceᵢ × Volumeᵢ) / Σᵢ₌anchor^t Volumeᵢ
Where Typical Price = (High + Low + Close) / 3
Each new bar updates the running cumulative sum. The line begins at the anchor candle's Typical Price and drifts based on subsequent volume-weighted price activity, extending forward through the present bar.
Common Anchor Points
- Earnings release date: Average cost of all post-earnings participants — the breakeven level for reactive buyers and sellers
- IPO or spin-off date: Average cost basis of all public-market buyers since listing; stocks frequently return to this level on their first major correction
- Quarterly open: Matches institutional performance benchmarks; fund managers use quarterly entry prices as implicit targets
- Gap open after a catalyst: Measures whether price has accepted or rejected value at the gap level since the event
- Major swing high or swing low: Identifies where distribution (from a swing high) or accumulation (from a swing low) began
Worked Example
TSLA gaps down to open at $242 following Q1 2025 earnings on April 22. An AVWAP anchored to that morning's open accumulates every TSLA share traded from $242 forward, weighted by volume.
Three weeks later, after a subsequent bounce, TSLA approaches the $255 AVWAP level from below. The $255 AVWAP represents the average price paid by every post-earnings buyer — including those who bought the gap-down at $242–$248 and those who chased the bounce to $258–$262. Participants who bought above $255 are underwater and become natural sellers at their breakeven. Participants who bought the initial gap-down are sitting on profit and may take partial exits.
TSLA stalls at $255 and reverses lower over the next three sessions, confirming the AVWAP as resistance. Active traders who entered short at $255 with a stop above $260 captured a clean 4% move back toward $244.
When Traders Use It
Post-earnings mean reversion: Stocks that gap sharply on earnings frequently re-test their post-event AVWAP within 3–6 weeks. The AVWAP serves as the first logical target for mean-reversion longs (stocks that gapped down) and the first resistance for recovery rallies (stocks that gapped up and failed).
Trend health confirmation: Price consistently trading above an upward-sloping AVWAP anchored to a key breakout point signals the trend is intact. A close below the AVWAP shifts the bias and flags potential trend failure.
Multiple AVWAP stacking: Running two AVWAPs simultaneously — one anchored to a major swing low and one to a recent swing high — defines a dynamic value zone. Price trading between them indicates equilibrium; a decisive close through either line shifts directional bias toward that anchor's participants.
Institutional cost basis estimation: Anchoring to the first day of a calendar quarter approximates where large systematic funds entered during the quarter. Price approaching that level from above often finds support as funds defend their cost basis.
Limitations and Common Misconceptions
Anchor selection is subjective. Standard VWAP resets at the same time for every trader; AVWAP anchor choice is discretionary, so two traders anchoring to different events produce different lines on identical charts — a limitation that makes AVWAP prone to post-hoc rationalization.
AVWAP is not predictive. It identifies where participants entered; their subsequent behavior (hold, sell, add) determines whether the level holds. Cost basis is an influence on behavior, not a price magnet.
Long-dated anchors dilute responsiveness. As the cumulative volume sum from a six-month anchor grows to billions of shares, each new session's contribution becomes a rounding error. A six-month AVWAP barely moves on even a record-volume session. Use shorter anchors for tactical levels; longer anchors for structural reference.
Session VWAP is a different tool. Intraday traders using session VWAP as a mean-reversion level are working with a reset-daily instrument on a single session's participants. AVWAP spans multiple sessions and captures the cost basis of a defined post-event participant group — conflating the two leads to misaligned analysis.