Guide
What is the VWAP indicator?
VWAP stands for Volume Weighted Average Price — the average price an instrument has traded at through the session, weighted by the volume done at each price. Because it favours prices where most shares changed hands, VWAP marks the day's true average cost of participation. Intraday traders use it as a reference for whether price is rich or cheap relative to where the bulk of trading happened.
What VWAP measures
VWAP answers one question: across everyone who traded today, what was the average price paid, giving more weight to the busiest prices? A simple average treats a tick with 10 shares the same as a tick with 10,000 shares. VWAP does not — it lets the heavy-volume prices dominate, so the line settles near the level where genuine business was done rather than where price briefly spiked on thin trade.
How VWAP is calculated
Conceptually, for each price bar you take a typical price — usually the average of high, low and close — and multiply it by the volume traded in that bar. You add up those price×volume figures from the market open onward, then divide by the total volume so far. The result is one running number that updates with every bar. Because it accumulates from the open, VWAP resets at the start of each session and is an intraday tool by design.
How to read VWAP
Price trading above VWAP says buyers have, on balance, paid up versus the session average; price below says sellers have pushed it under the average cost. Many intraday traders treat VWAP as a dynamic line of balance — pullbacks toward it in an uptrend, or rallies into it in a downtrend, are watched as decision points. Institutional desks also use VWAP as a benchmark to judge whether their own fills beat or lagged the day's average.
What VWAP does not do
VWAP is not a forecast and not a buy or sell instruction. It describes where trading has already happened, not where price is going. It also carries no memory across days — yesterday's VWAP is gone at today's open — so it is unsuited to swing or positional analysis on its own. And on illiquid stocks where volume is patchy, the line can be dragged around by a few large prints and mean less than it appears to.
The classic VWAP misuse
The common error is mechanical: buy every time price crosses above VWAP, sell every time it crosses below. In a choppy, range-bound session price whipsaws across the line repeatedly, and that rule bleeds money on costs. VWAP is a context line, not a trigger. It works best read alongside trend, support and resistance, and volume — confirming a setup, never replacing the judgement behind it.
Common Questions
Frequently Asked Questions
Is VWAP good for intraday trading?
+VWAP is built for intraday use because it accumulates from the session open and resets the next day. Many NSE intraday traders use it as a reference for average cost and as a dynamic level to watch. It is a context tool, not a standalone signal, and means little on thinly traded stocks.
What is the difference between VWAP and a moving average?
+A moving average weights every bar by time alone, so a quiet bar and a busy bar count equally. VWAP weights each bar by its volume, so heavily traded prices pull the line toward them. VWAP also resets daily, whereas a moving average rolls continuously across sessions.
Does price always return to VWAP?
+No. Price often revisits VWAP during balanced or range-bound sessions, but in a strong trending day it can stay well above or below the line for hours. Treating reversion to VWAP as a certainty is a common and costly assumption.
Can I use VWAP on Nifty and Bank Nifty?
+Yes. VWAP is widely watched on liquid index instruments like Nifty and Bank Nifty, where high volume makes the line meaningful. Always read it in context with the broader trend rather than acting on a single cross.