Relative Volatility Index, refined high/low form (RVIR)

Summary

Relative Volatility Index, refined form: Donald Dorsey's 1995 revision of his own indicator, which runs the 1993 RVI over the daily highs and again over the daily lows and averages the two indices.

Output is bounded [0..100] and is interpreted like RVI: above 50 the highs and lows have been more volatile while rising than while falling, below 50 the reverse. Dorsey's stated reason for the revision is that a high and a low carry the day's range, so the pair answers the question the close alone can only approximate.

Formula

RVIR[i] = 0.5 * ( RVI(high)[i] + RVI(low)[i] )

Both legs use the same optInTimePeriod and optInStdDevPeriod, so they warm on the same bar.

Notes

RVIR is the 1995 revision; RVI is the 1993 version.

Inputs

inHigh — High price of each bar
inLow — Low price of each bar

Outputs

outReal — The averaged index, in 0..100

Parameters

Parameter	Type	Default	Accepted values	Description
`optInTimePeriod`	integer	14	1–100000	Wilder smoothing period applied to both legs of both indices
`optInStdDevPeriod`	integer	10	2–100000	Number of trailing values each standard deviation spans

Properties

Numerical Stability: Initial Unstable Period — Inherited from RVI, which RVIR computes internally; tunable via RVI's unstable period.


☐ Overlap Input
✅ Independent Y-Axis i
☐ Candlestick
☐ Can Output NaN or ±Inf
☐ Identity at Period 1

Implementation

TA-Lib Definition: rvir.c · rvir.yaml

Native	File
C	`ta_RVIR.c`
Rust	`rvir.rs`
Java	`Core_RVIR.java`
C#	`Core_RVIR.cs`

TA-Lib is also available for Python, R and more using a wrapper.

Aliases

Relative Volatility Index (1995 revision), RVIr

References

Dorsey, Donald. "Refining the Relative Volatility Index." Technical Analysis of Stocks & Commodities, V.13:9 (September 1995), 388-391.
Dorsey, Donald. "The Relative Volatility Index." Technical Analysis of Stocks & Commodities, V.11:6 (June 1993), 253-256.