VWAP and Standard Deviation Bands vs the Value Area: Formula, Anchored VWAP and Differences from the POC
Lesson 7 of 9 · Intermediate
What is VWAP and how is it calculated?
VWAP (volume-weighted average price) is the average price of trades weighted by volume. From a starting point (usually the start of the session), for each trade or each bar you multiply price by volume, add up those products and divide by total volume:
VWAP = sum(price × volume) ÷ sum(volume)
Many platforms use the "typical price" for each bar, the average of high, low and close; calculating from tick data is more accurate. The plain-language meaning of VWAP is: the average price everyone who traded has paid from the start of the session until now. That is why many institutions measure the execution quality of large orders against VWAP: a buy executed below the day's VWAP counts as good execution to them.
VWAP bands
Standard VWAP bands are built from a volume-weighted standard deviation: for each trade, square the distance from price to VWAP, multiply by volume, sum, divide by total volume and take the square root. The result is one unit of standard deviation, and bands are drawn one, two and sometimes three units above and below VWAP. Some platforms also offer fixed-percentage bands, which is a different concept.
One precise point: market prices are not normally distributed, so the idea that "price stays inside the second band 95 percent of the time" is not correct. The bands only show how stretched the current price is relative to the dispersion of today's trade.
A simple use of the bands is to gauge "extension": when price reaches the second band on a balanced day, it has moved far from the average of today's trade, and entering in that same direction carries more risk. On a trend day, however, the first band can act as a rail for hours. The width of the bands is information too: narrow bands mean today's trade has been compressed and balanced, wide bands mean dispersion and high volatility. For gold, start the daily VWAP at the same session you use for the profile, either the full Globex session or the COMEX day session; otherwise comparing VWAP with the value area is meaningless.
VWAP versus the POC and value area
Both tools answer the question "where does the market consider fair value today?", but in two different ways:
| Feature | VWAP and bands | POC and value area |
| Type of statistic | Weighted mean | Mode and the range holding 70% of volume |
| Behaviour through the day | Moves smoothly and continuously | The POC can jump suddenly |
| Sensitivity to extreme moves | High; volume at the extremes pulls VWAP | Low; the mode is insensitive to the ends of the distribution |
| Symmetry | Bands are symmetrical | The value area can be asymmetrical |
On a balanced D-shaped day, VWAP and the POC are usually close. On a P or b day or a trend day they drift apart: the POC settles in the new high-volume area while VWAP, averaging every trade, lags toward the earlier part of the day. That gap is information. If price is above both VWAP and the POC and both are rising, buyers are in control; if price is above the POC but below VWAP, the picture is mixed.
Hypothetical example: in a GC session, VWAP is 4,006.2 and the one-standard-deviation band runs from 3,999.8 to 4,012.6, while the volume value area is 4,001.0 to 4,014.0. The two ranges overlap heavily, but the edges differ, and a gap of a few dollars between edges matters in gold. These numbers are illustrative only.
Anchored VWAP
VWAP does not have to start at the session open. With an anchored VWAP you choose the starting point yourself: an important high or low, a rate-decision day, the start of the week or a contract roll day. It shows whether those who have traded since that event are, on average, in profit or loss. For example, an anchored VWAP from the low before a gold rally estimates the average price paid by buyers of that rally. When price returns to it, it is a break-even point for that group.
Practical use and limits
- Trend day: price usually stays on one side of VWAP and pullbacks are limited to VWAP or the first band. Crossing VWAP and holding on the other side on such a day is a warning that control may be changing.
- Balanced day: price crosses VWAP from both sides several times and VWAP is nearly flat. VWAP carries little directional information here, and the edges of the value area are more useful.
- Limit: early in the session VWAP and the bands are built on little data and are unstable. After news spikes the bands widen after the move and give no warning in advance.
- Data: VWAP on XAUUSD is weighted by the broker's tick volume. It usually sits close to futures VWAP (after subtracting the basis: XAUUSD level = GC level − basis) but is not identical. The session start must match your profile.
Common mistakes
- Assuming price must turn at the second band because it is "statistically unlikely" to stay beyond it; price is not normally distributed.
- Treating VWAP and the POC as the same thing; one is a mean and the other a mode, and they diverge on asymmetric days.
- Relying on VWAP in the first hour of the session, when it rests on very little data.
- Anchoring VWAP at random points instead of genuinely important events.
What does volume say here?
Order flow helps you judge whether VWAP or a band is active when price touches it:
- In a trend-day pullback to VWAP, if aggressive selling is absorbed near VWAP and delta quickly turns positive again, that is consistent with buyers staying in control.
- At the second band, if aggressive buying is still strong and price advances with stacked imbalances, "stretch" alone is no reason for a reversal; but if aggressive volume surges and price does not advance, that signals fatigue.
- Comparing cumulative delta with price position relative to VWAP is a simple filter: price above VWAP while cumulative delta is negative and falling is a contradictory picture that calls for more caution.
📊 See real gold futures volume behind these ideas: free order flow course · today's gold volume map
Frequently asked questions
What is VWAP and how does it differ from a moving average?
VWAP is the volume-weighted average price from a defined starting point, while an ordinary moving average averages bars over a sliding window without regard to volume.
Is VWAP better than the value area?
Neither is better; they complement each other. VWAP shows the mean and who controls it, and the value area shows the range where volume was accepted. The gap between them is information in itself.
Where should I anchor an anchored VWAP?
At genuinely important events: the high or low of a major move, a rate-decision day, the start of a week or month, or a futures roll day.
Education only, not a recommendation to buy or sell; we never give signals. Price examples are illustrative. Test any method on a demo account first, with strict risk management.