Volume Weighted Moving Average
What Is the Volume Weighted Moving Average (VWMA)?
The Volume Weighted Moving Average (VWMA) is a technical indicator that averages price data while giving more weight to periods with higher trading volume.
The Volume Weighted Moving Average (VWMA) is a variation of the traditional moving average that factors trading volume into its calculation. While a Simple Moving Average (SMA) treats the closing price of every period equally, the VWMA assigns a weight to each closing price based on the volume traded during that period. This weighting mechanism ensures that prices accompanied by heavy trading activity have a greater influence on the average than prices formed on thin volume. The logic is that high-volume moves represent higher market conviction and are therefore more significant. The VWMA is primarily used to smooth out price data and identify trends, but with the added benefit of volume confirmation. It is responsive to "real" market moves driven by institutional participation while being less reactive to price spikes caused by low liquidity.
Key Takeaways
- VWMA places greater emphasis on price data from high-volume days than low-volume days.
- It is used to identify emerging trends and confirm the strength of existing ones.
- Traders often compare the VWMA to a Simple Moving Average (SMA) to spot volume-supported moves.
- If VWMA is above the SMA, it indicates that volume is supporting the price increase.
- It helps filter out choppy price action that occurs on low volume.
How VWMA Works
The VWMA works by calculating an average price where each data point's importance is proportional to its volume. The calculation is relatively straightforward: 1. Multiply the Close Price of each period by the Volume of that period. 2. Sum these values over the specified number of periods (N). 3. Sum the Volume over the same number of periods (N). 4. Divide the Sum of (Price * Volume) by the Sum of Volume. The result is a moving average line that hugs price more closely during high-volume trends and lags further behind during low-volume consolidations. By comparing the VWMA to a standard SMA of the same length, traders can decipher the relationship between price and volume.
VWMA vs. SMA Strategy
Comparing VWMA and SMA reveals market secrets.
| Scenario | Signal | Interpretation |
|---|---|---|
| VWMA > SMA | Bullish | Volume is higher on up days; strong uptrend. |
| VWMA < SMA | Bearish | Volume is higher on down days; strong downtrend. |
| VWMA ≈ SMA | Neutral | Volume is average; market is ranging or consolidating. |
Real-World Example: Confirming a Breakout
A trader is watching a stock that has been stuck in a range between $50 and $55. They are using a 20-day SMA and a 20-day VWMA.
Advantages of VWMA
The VWMA offers unique benefits: * Trend Validation: It automatically validates trends. If price is rising and VWMA is rising faster than the SMA, the trend is healthy. * Noise Filtering: It ignores price fluctuations that happen on low volume, preventing "whipsaws" in chopping markets. * Divergence Detection: Gaps between the VWMA and SMA highlight underlying shifts in supply and demand before they are obvious on the price chart.
Disadvantages of VWMA
Like all indicators, it has drawbacks: * Lag: It is still a moving average based on past data, so it will lag the current price. * Volume Data Dependency: It requires accurate volume data. On some forex pairs or CFDs, volume might be tick-based rather than actual volume, which can affect accuracy. * Simplicity: On its own, it may not generate enough signals for a complete trading system and works best when paired with other tools.
FAQs
VWAP is a cumulative indicator that resets daily and uses all intraday data from the open. VWMA is a "rolling" average over a fixed number of periods (e.g., 20 days) and does not reset daily. VWAP is for day trading; VWMA is better for swing trading.
Common settings include the 20-period VWMA for short-term trends (often paired with a 20 SMA) and the 50-period VWMA for medium-term trends. The "best" setting depends on the trader's timeframe.
Yes, like any moving average, the VWMA line often acts as dynamic support in an uptrend and resistance in a downtrend.
Yes, it works well for crypto assets with reliable volume data. It is particularly useful for spotting "fakeouts" (price moves with low volume) which are common in crypto markets.
A common strategy is to buy when the VWMA crosses above the SMA (signaling high-volume buying) and sell when the VWMA crosses below the SMA (signaling high-volume selling).
The Bottom Line
The Volume Weighted Moving Average (VWMA) is a sophisticated upgrade to the standard moving average, offering traders a way to verify the strength of price trends. By listening to the message of volume, the VWMA helps distinguish between meaningful market moves and mere noise. Investors looking to refine their trend-following strategies should consider replacing or supplementing their standard SMAs with VWMAs. The relationship between the two averages provides a simple yet powerful visual cue for market conviction. When volume supports price, the trend is your friend; when it doesn't, the VWMA will be the first to let you know.
More in Technical Indicators
At a Glance
Key Takeaways
- VWMA places greater emphasis on price data from high-volume days than low-volume days.
- It is used to identify emerging trends and confirm the strength of existing ones.
- Traders often compare the VWMA to a Simple Moving Average (SMA) to spot volume-supported moves.
- If VWMA is above the SMA, it indicates that volume is supporting the price increase.