What “whale activity” means on Isobath
On Isobath, a whale is not a personality label and it is not a claim that a wallet is smart money. It is an account with a large observed position or a large observed change inside a defined market frame. The product starts with disclosed Hyperliquid account state and turns successive observations into a record you can inspect.
That distinction matters. A price chart tells you where BTC moved. Open interest tells you how much aggregate exposure changed. An Isobath market page adds the account layer: which observed wallet changed, in which direction, by how much, and what was visible before and after.
Step 1: choose a market and a window
Start with BTC, ETH, SOL, HYPE, or XRP and choose the observation window that matches your question. A latest window helps you find the newest material event; a 6-hour or 24-hour window helps you compare a broader period. The selected window is part of the answer, not a hidden implementation detail.
Read the observation rail before reading the ranking. It tells you the observation age, the number of accounts checked, unavailable accounts, the fixed wallet frame, and coverage where available. If the scan is stale or the frame is narrow, that should change how broadly you generalize the result.
Step 2: classify the event
Isobath separates the main changes so “whale activity” is not one vague bucket:
- Opened: the account had no observed position and then had one.
- Closed: an observed position was present and then fell away.
- Increased: exposure grew on the same side.
- Reduced: exposure became smaller on the same side.
- Flipped: the observed side changed from long to short or short to long.
- Collateral change: available collateral moved materially, even when position exposure itself was not the event.
These are descriptions of successive account states. They are not labels for a trader’s motive.
Step 3: read the before-and-after record
Every useful event answers three questions: what was the observed notional before, what was it after, and what is the delta? For example, an observed BTC wallet moving from $23.3M to $24.7M has a +$1.4M exposure change. The number is meaningful because the page also keeps the market, side, timestamp, and comparison window attached.
Do not confuse the event delta with the account’s total position. A +$50K increase can be a small adjustment to a large wallet; a position opening from zero is a different event even if the final notional is similar. The event type and the before/after pair provide that distinction.
Step 4: follow the account behind the event
Use “Inspect account” to open the wallet record. There you can see the current observed state, the position side, prior material events, exposure history, collateral history, and the depth of the stored record. The same address is a separate wallet-market pair on BTC and ETH because its behavior can differ by market.
For repeated monitoring, add the pair to your watchlist. That changes Isobath from a page you refresh into a record you can revisit when a watched account changes again.
Step 5: compare the event with market context
After inspecting a wallet, compare it with the Heatmap, Rotation, market flow, and concentration views. A single account increase is one observation. A broad increase across several large accounts, a concentration shift, or a same-account reduction in one asset alongside an increase in another is a different research question.
The Daily Tape is useful when you need a dated record rather than a live dashboard state. It lets you return to what Isobath recorded for that market and day.
How to write about a whale change responsibly
A strong description names the market, event type, before and after values, observed time, window, rank or share if shown, and coverage. “Observed BTC wallet increased exposure from $23.3M to $24.7M during the stated window” is grounded. “A smart-money whale is bullish” adds claims the record does not establish.
For the field definitions and ranking rules, read Isobath’s methodology and the glossary. Together they explain what the product records and how to cite it.