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lib/volume/vo/Vo.md
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# VO: Volume Oscillator
| Property | Value |
| ---------------- | -------------------------------- |
| **Category** | Volume |
| **Inputs** | OHLCV bar (TBar) |
| **Parameters** | `shortPeriod` (default 5), `longPeriod` (default 10), `signalPeriod` (default 10) |
| **Outputs** | Single series (Vo) |
| **Output range** | Unbounded |
| **Warmup** | 1 bar |
### TL;DR
- The Volume Oscillator (VO) measures the difference between two moving averages of volume, expressed as a percentage.
- Parameterized by `shortperiod` (default 5), `longperiod` (default 10), `signalperiod` (default 10).
- Output range: Unbounded.
- Requires 1 bar of warmup before first valid output (IsHot = true).
- Validated against TA-Lib, Skender, and Tulip reference implementations where available.
> "Volume tells us the conviction behind price moves—the oscillator reveals when that conviction is accelerating or fading."
The Volume Oscillator (VO) measures the difference between two moving averages of volume, expressed as a percentage. It helps identify changes in volume trends and potential momentum shifts by comparing short-term volume activity against longer-term volume norms.
@@ -167,4 +184,4 @@ With defaults (5, 10, 10): ~328 bytes per instance.
- Murphy, J. J. (1999). *Technical Analysis of the Financial Markets*. New York Institute of Finance.
- Achelis, S. B. (2001). *Technical Analysis from A to Z*. McGraw-Hill.
- PineScript Reference: vo.pine
- PineScript Reference: vo.pine