Relative Volume (RVOL)

Relative Volume answers one question: is this market trading more or less than it *normally* does right now? It compares current volume to a typical baseline, so a spike or a lull becomes a number instead of a guess.

In 30 Seconds

• RVOL compares current volume to normal volume — is trading heavier or lighter than usual right now?
• "High volume" is meaningless in isolation — it only matters relative to what's normal for this market and time.
• RVOL is directionless — heavy volume happens on both rallies and selloffs.
• MPM expresses volume conditions objectively — "high volume" maps to a disclosed comparison against a baseline, reported as context.

Definition

Relative Volume compares the volume happening now to a reference level of what's "normal" for this market — typically an average of recent comparable periods. The result is usually expressed as a ratio or a comparison:

• Above normal — more trading than usual; the market is unusually active.
• Below normal — less trading than usual; the market is unusually quiet.
• Around normal — activity is typical.

The key idea is *normalization*. Raw volume can't be compared across markets or across times of day — but "twice the normal volume" means the same *relative* thing everywhere. This is what makes RVOL useful: it turns an unquantifiable feeling ("seems busy today") into an objective, comparable statement.

"RVOL measures how busy a market is versus its own normal — not how busy in absolute terms, and not which way it's going."

Why It Matters

Volume reflects the level of participation during a move, and traders watch it closely — but *raw* volume is nearly useless without context. A big volume number means nothing if you don't know what's normal. RVOL supplies that context.

Knowing whether activity is unusually high or low genuinely changes how you read a market: a move on well-above-normal volume reflects broad participation, while the same move on thin volume reflects fewer participants and warrants more context. A breakout, a reversal, a range — each reads differently depending on whether the market is actually engaged or barely trading. RVOL makes that engagement measurable.

But the honest caveat is the same as every other indicator: RVOL is *directionless*. High relative volume tells you the market is active, not which way it's headed. Heavy volume marks both climactic tops and explosive rallies. The useful question is never "volume is high, so buy" — it's "when volume has been this unusual in this market's history, what actually happened next?"

How It Works (a simple example)

Suppose over the last 20 bars a market's volume has averaged about 10,000 contracts, with a typical bar-to-bar variation of a few thousand. In the current bar it trades 25,000 — far above that recent average. Expressed as a z-score (how many standard deviations above the recent mean), that's a large positive reading, and HIE would classify it as "high volume." The point is the same either way: current activity is being judged against the market's *own recent normal* — here, the trailing 20 bars — rather than against a raw number. Note this baseline is time-of-day-agnostic: the current bar is measured against the last 20 bars, not against how this particular hour usually behaves.

Now notice what RVOL did *not* say: whether those 25,000 contracts were aggressive buyers or aggressive sellers. Heavy volume simply means lots of trading — lots of *both* sides. If price rose on that volume, participation confirmed the move; if it fell, the same is true in reverse. RVOL quantified the *activity*; direction came from price, not from the volume figure.

How MPM Uses Relative Volume

An important honesty point specific to this term: HIE has no separate, named "RVOL" metric of its own. When you use relative-volume phrasing — including the word "RVOL" itself, as in "GC above 2 RVOL" — it resolves to a volume-versus-average comparison, disclosed in full in the "What ran" line (for example, *relative volume: 2× its 20-bar average*). In other words, the *idea* of relative volume is fully supported; there just isn't a distinct RVOL indicator behind it — the phrasing reaches a volume z-score / volume-vs-average comparison. What HIE supports, reached through this volume phrasing:

VOLUME > 2 × MEAN(VOLUME, window=20, method=simple, rolling, strictly-trailing, v1) (relative volume: 2× its 20-bar average)

A bare phrase like "high RVOL" maps to HIE's volume z-score condition, with the substitution disclosed the same way.

The 20-bar baseline is the same flat, rolling comparison used elsewhere — the last 20 bars regardless of time of day — so the reading is honest about what is actually measured.

Interpretation

• High relative volume — unusually active; broad participation. Confirms that a move has real engagement behind it — but says nothing about direction.
• Low relative volume — unusually quiet; thin participation. Moves on low volume reflect fewer participants and therefore deserve additional context before being read as meaningful.
• Normal relative volume — typical activity; nothing unusual about participation.

The honest reading: RVOL tells you *how engaged* the market is, which is real and useful context — but it's context for interpreting a move, not a signal to take one.

Common Mistakes

"High volume means the price will go up."

Volume is directionless. Heavy volume happens on selloffs as much as rallies. High RVOL means participation, not direction.

"Raw volume tells me if today is busy."

Not without a baseline. Raw volume can't be judged unusual until compared to normal — which is the entire point of *relative* volume.

"Low volume is always bearish."

Low volume means thin participation, which can happen in quiet uptrends, downtrends, or ranges. It's a note of caution about reliability, not a directional signal.

What It Is Not

• Not a direction indicator. High volume is directionless — activity only.
• Not meaningful in raw form. Volume only becomes informative relative to normal.
• Not a prediction. It describes current participation, not future movement.

Limitations

Relative volume depends entirely on what baseline it's compared against — a different reference window can change whether the same volume looks "high" or "normal." It's also purely a measure of *activity*, so it must be paired with price to mean anything directional, and with other context to judge reliability. Volume data itself can be affected by session boundaries, rollovers, and time-of-day patterns, all of which a good relative measure must account for.

How This Fits Into MPM

It's part of the volume vocabulary that lets a phrase like "on unusually heavy volume" carry an objective, disclosed meaning instead of a subjective one.