VWAP

Volume Weighted Average Price (VWAP) is a technical indicator that calculates the average price of a security weighted by its trading volume over a specific period. By giving more influence to prices traded at higher volumes, VWAP provides a benchmark that reflects the true cost of market activity rather than a simple arithmetic mean.

How It Works

VWAP is computed by multiplying each trade’s price by its volume, summing those products, and then dividing by the total volume traded during the chosen timeframe.

• Formula: VWAP = Σ (Priceᵢ × Volumeᵢ) / Σ Volumeᵢ
• Typical period: Intraday, resetting at the market open; can also be applied to daily, weekly, or custom intervals.
• Calculation steps:
  1. For each trade or price bar, record the price and the corresponding volume.
  2. Multiply price by volume to get the volume‑weighted value.
  3. Accumulate the volume‑weighted values and the total volume.
  4. Divide the accumulated volume‑weighted sum by the total volume.
• The resulting VWAP line is plotted on a price chart; traders watch how the current price relates to this line.

Why It Matters

VWAP serves as a reference for assessing whether a security is trading at a fair price relative to volume‑weighted market activity.

• Institutional trading: Large funds aim to execute orders near VWAP to minimize market impact and avoid adverse price moves.
• Trend identification: When price consistently stays above VWAP, it suggests bullish sentiment; sustained trading below VWAP can indicate bearish pressure.
• Example: A trader notices that a stock’s price has risen above its intraday VWAP for the first two hours of the session. Interpreting this as buying interest, they may enter a long position, expecting the upward bias to continue unless the price falls back to or below VWAP.
• Because VWAP incorporates volume, it filters out price moves that occur on thin trading, offering a more reliable gauge of market consensus than a simple moving average.