VWAP is the session's average price weighted by volume, and its bands sit one and two volume-weighted standard deviations (σ) above and below it. On NQ, ±2σ isn't rare: counting from 11:00 ET, price reached it on 83% of sessions over five years, and only 62% of those days traded back to VWAP afterwards. The bands measure how stretched price is, not when it will turn.
How VWAP is calculated
VWAP (volume-weighted average price) = Σ(price × volume) ÷ Σ(volume), restarted at an anchor, usually the 09:30 ET open. Most tools use each bar's typical price, (high + low + close) ÷ 3. Because every trade counts in proportion to its size, VWAP is the average price everyone paid during the session, which is why large desks judge their fills against it.
How the bands are calculated
The bands use the volume-weighted standard deviation of price around VWAP: σ² = Σ(volume × price²) ÷ Σ(volume) − VWAP². The 1σ bands sit one σ either side of VWAP, the 2σ bands two. Unlike Bollinger Bands, which weight the last 20 closes equally, VWAP bands use every bar since the anchor, weighted by volume, so they settle as the day goes on.
Why early bands mean little
In the first minutes after 09:30 there's very little data, so σ is close to zero and the bands hug VWAP. Almost any move touches them. Counting from 10:00, NQ touched ±2σ on 98% of sessions; from 11:00, 83%; from noon, 70%. Give the bands the first hour or so before reading anything into a touch.
What five years of NQ show
We measured every regular session from July 2021 to July 2026 (1,242 days) on one-minute bars, comparing each bar with the bands as they stood at the previous bar's close, and counting from 11:00:
- Price reached ±1σ on virtually every day (99.9%). One σ is ordinary movement, not an extreme.
- It reached ±2σ on 83% of days, and ±3σ on 26%.
- After the first ±2σ touch, price traded back to VWAP later the same day 62% of the time, a median of about an hour later. Counting from noon instead, only 45%.
- 53% of sessions closed more than 1σ from VWAP and 9% more than 2σ: trend days, where price rides one band all afternoon.
Is 2σ a reversal signal?
Not on its own. In a separate backtest, a mechanical fade (enter on a rejection at ±2σ with a volume filter, stop at 3σ, 2R target) made money in 2025 and 2026 and lost in 2023 and 2024. The result depended on the kind of year, not on the band. Anchoring VWAP at the 18:00 futures open and trading the bands around the clock lost in every form we tried.
How traders use the bands
- As a map of stretch: is price near fair value (VWAP), normally extended (1σ) or unusually far (2σ and beyond)?
- To recognise trend days: when price holds above VWAP and keeps returning to the upper bands, fading it means fighting the day.
- For trade location: waiting for a pullback toward VWAP or the 1σ band in a trend instead of chasing a 2σ extension.
- As confluence with other levels, such as the prior day's value area or session highs and lows.
Historical statistics and simulated results on NQ continuous-contract one-minute bars, regular session only. They don't guarantee future results.