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lib/volume/pvt/Pvt.md
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# PVT: Price Volume Trend
| Property | Value |
| ---------------- | -------------------------------- |
| **Category** | Volume |
| **Inputs** | OHLCV bar (TBar) |
| **Parameters** | None |
| **Outputs** | Single series (PVT) |
| **Output range** | Unbounded |
| **Warmup** | `> 2` bars |
### TL;DR
- Price Volume Trend refines the OBV concept by weighting volume according to the percentage price change rather than using an all-or-nothing approach.
- No configurable parameters; computation is stateless per bar.
- Output range: Unbounded.
- Requires `> 2` bars of warmup before first valid output (IsHot = true).
- Validated against TA-Lib, Skender, and Tulip reference implementations where available.
> "Volume tells you about the intensity of price moves, but PVT tells you what volume is actually accomplishing." — Unknown
Price Volume Trend refines the OBV concept by weighting volume according to the percentage price change rather than using an all-or-nothing approach. Where OBV assigns the entire bar's volume to either buyers or sellers, PVT scales the volume contribution by the relative price movement—a 1% move adds only 1% of volume to the running total.
@@ -200,4 +217,4 @@ The default signal period is typically 14-21 bars.
- Murphy, J. (1999). *Technical Analysis of the Financial Markets*. New York Institute of Finance.
- Investopedia. "Price Volume Trend (PVT)." [Definition](https://www.investopedia.com/terms/p/pricevolumetrend.asp)
- StockCharts. "Price Volume Trend." [Technical Indicators](https://school.stockcharts.com/doku.php?id=technical_indicators:price_volume_trend_pvt)
- TradingView. "Volume Indicators." [Reference](https://www.tradingview.com/scripts/volume/)
- TradingView. "Volume Indicators." [Reference](https://www.tradingview.com/scripts/volume/)