Free · No account · Runs in your browser
Klustra draws live bid-by-ask footprint charts, volume profile, DOM and CVD straight from the exchange's own stream — in your browser, at 60 frames a second. There is no account, no download, and no paid tier. Open a chart and it is already running.
Connected directly to Binance, Bybit, OKX, Bitget, Gate.io and Hyperliquid.
Most market overviews show you price. Price is the outcome. These are the inputs: which side had to cross the spread, how much leverage is still on the table, and what got forced out. Every figure here is read by your own browser directly from the exchange.
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The Bitcoin perpetual is the deepest order flow market in crypto and the one most footprint work is calibrated against. Its 24-hour delta is the taker side of every print — the volume that paid the spread — so a positive delta against a falling price is the clearest absorption signal the market gives you.
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Ethereum's perpetual carries a different crowd. More of its volume arrives in bursts around deleveraging, which is why the open interest and liquidation split here often move before the price does rather than after it.
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Solana's perpetual is thinner and faster than the other two, so the largest single trade of the hour matters more. One order can take out several ticks at once, and the footprint shows you exactly which levels it cleared.
A candle tells you where price opened, how far it travelled and where it closed. A footprint chart tells you what happened inside it: how much traded at every single price, and which side was the one crossing the spread to get filled. Everything below is happening on the live Bitcoin bar beside it.
Every price level in a footprint bar prints two numbers. The left is volume that traded at the bid — somebody sold into a resting buy order. The right is volume that traded at the ask — somebody bought from a resting sell order. Both sides of every trade are always present; what the split tells you is who was impatient. Resting orders wait. Market orders pay the spread. Separating the two is the whole idea.
Delta is ask volume minus bid volume — buying that crossed the spread minus selling that crossed it. Per level it says which side was working that price. Per bar it says what the auction cost the aggressors. The useful part is not the number, it is the disagreement between the number and the price. A bar that closes green on negative delta was pushed up by sellers being absorbed, not by buyers arriving, and it is a completely different bar from one that closed green on plus nine hundred.
An imbalance compares the two sides of the same spread, which is why it is read diagonally and not straight across. To buy at the ask at a price, your counterparty is a limit seller resting there. To sell at the bid one tick below, your counterparty is a limit buyer resting there. Those two orders are the quote. So Klustra compares ask volume at each price against bid volume at the price one tick beneath it, and marks the level when one side is three or more times the other. Comparing a level against itself compares trades that were never competing for the same resting order.
One imbalance is noise. Three or more consecutive levels imbalanced the same way is a stack, and a stack is a stretch of price where one side kept having to pay up and the other kept refusing to. Those are the ranges worth drawing a line on, because when price comes back the side that lost that fight often has unfinished business there.
The point of control is the price that traded the most volume — in one bar, in a session, or in a range you draw yourself. It is where the auction agreed. Price leaving a POC quickly and not returning is acceptance somewhere else. Price grinding back to it again and again is a market that has decided nothing yet, and trading against that is how ranges take your money.
Absorption is heavy one-sided delta with no price to show for it. Six hundred contracts lift the offer and the bar closes on the tick it opened: the passive side ate all of it. That reads stronger than any indicator, because you watched the aggressive side lose in real time.
Exhaustion is the opposite shape, at the extreme. Take the top level of the bar and compare it with the level beneath: if the volume collapses to a fraction of what was trading one tick lower, the buyers ran out before the sellers did.
An unfinished auction is the detail most explanations skip. At a genuine high the top level should be one-sided — buyers lifted the offer, nobody sold up there, and the auction turned. If the extreme level prints volume on both sides, the turn was interrupted rather than completed, and price usually comes back to finish it. Those levels are the highest-quality magnets on the chart.
Put it together on a live BTC bar and the sequence reads like a sentence. A stacked buy imbalance forms on the way up. The next bar prints a large positive delta but a smaller range than the one before it. The level at the high shows volume on both sides. That is aggressive buying being absorbed at an unfinished high — a poor place to buy, and a defensible place to be short with the stop above the stack. None of it is visible on a candle, and all of it is in the free chart.
Each of these has its own page, with settings, worked examples and the cases where it misleads you: Footprint charts, Volume profile chart, DOM — depth of market.
Free order flow software
Every tool below is on the free plan, because there is only one plan. Each render here is the real engine on live data, not a screenshot.
Bid by ask at every price, in four cell modes: raw bid×ask, delta, total volume, or a delta profile that draws the bar's own shape. Imbalance ratio and stack length are yours to set. Tick grouping follows the zoom automatically, so cells never collapse into unreadable slivers.
Open Footprint chartsSession, daily, weekly, composite, or anchored to a point you pick. Value area with VAH and VAL, and high- and low-volume nodes marked. Bars can show total volume as heat, the buy and sell split, or net delta — the last of which most platforms do not draw at all.
Open Volume profile chartLetters or blocks, merged or split by bracket, with the initial balance, single prints and poor highs and lows marked. TPO measures time at a price where volume profile measures size at a price. A level that is heavy on one and thin on the other is telling you which crowd was there.
Open Market profile (TPO)A live ladder of resting bids and offers with volume traded at each price beside it, big orders highlighted against the book's own median size, and placed and pulled orders flashing as they happen. Watching a wall get pulled is the fastest lesson available in what the book is actually worth.
Open DOM — depth of marketForced closes plotted where they filled, sized by notional and clustered into cascades. Marked by the position that died, not the direction of the order that closed it — exchanges report the latter, and carrying that through unflipped paints every long cascade as a short.
Open LiquidationsDelta summed across bars as candles, a line or a histogram, with divergences against price flagged automatically. CVD making a lower high while price makes a higher high is the most useful single divergence in the product, and it is why aggregated CVD is not gated here.
Open Cumulative volume delta (CVD)Prints above your size threshold drawn as bubbles on the chart, clustered so that one order sweeping several prices reads as one order rather than a burst of small ones. A time and sales panel sits beside it, filtered to the same threshold.
Open Big trades and the tapeStep the market forward from any point in the history with the full footprint rebuilding as it goes. This is how you practise reading flow without waiting for a session to come to you, and it is the tool most often locked behind the top tier elsewhere.
Open Bar replayKlustra runs entirely in the tab. When you open a chart your browser opens a WebSocket to the exchange and receives the same trade stream a desktop terminal does. It aggregates that into footprints in a Web Worker on your own machine and paints it on a canvas. There is no request to us anywhere in that path.
That is not a privacy policy, it is the architecture, and it has three consequences you can verify yourself in the network tab. Your charts are as fast as your own connection to the exchange, because nothing sits in the middle. We could not sell your market data or hand it to anyone if we wanted to, because we never receive it. And there is no account, so there is no password store to breach, no email list, and no user record on any server.
Our servers do two things: serve this page, and host pre-aggregated historical candle files on a CDN so a chart can open with years of scrollback already loaded. One exception exists and is documented rather than hidden — Gate.io publishes no CORS header on any host, so its reference data and history pass through a narrow read-only mirror. Its live tape still goes straight to your browser.
Page views are counted with a cookieless first-party counter that stores no identifier: no user id, no session id, no IP address, no referrer. Your layouts, drawings and settings live in your browser's own storage and never leave the device.
The privacy claim and the speed claim are the same claim. Removing the hop in the middle is what produces both.
These are all good tools, and each does things Klustra does not — the established desktop platforms carry broker integrations, traditional futures data and years of accumulated features. This table is narrower than that: what it costs to start, and what you have to install or sign up for.
| Price to start | Klustra | Exocharts | TradingLite | Bookmap | ATAS |
|---|---|---|---|---|---|
| Price to start | Free | from €28 / month | from $12.95 / month | free tier, paid from $39 / month | free tier, paid from $24.95 / month |
| Runs in a browser | Yes | Yes, on the web plan | Yes | Desktop app | Desktop app |
| Account required | No | Yes | Yes | Yes | Yes |
| What the free option gives you | Everything on this page | Trial | 14-day trial, limited data and history | Crypto data; stocks and futures delayed | Limited feature set on the free tier |
List prices published by each vendor, checked on 27 July 2026, entry tier only and excluding market-data fees, which several of these charge separately. Plans change — follow the link before you decide.
Nothing. There is no plan to choose.
No card, no trial that expires, nothing to cancel.
Footprint, volume profile, TPO, DOM with full depth, liquidations, open interest, CVD, VWAP with bands, big trades, alerts, bar replay, multi-chart layouts, saved workspaces, multi-exchange aggregation, and the full history archive. All of it, for everyone, with no account.
By the right-hand rail: exchange affiliate links, one sponsor slot, and donations. That is the entire model. A paid tier would have gated exactly the things that make one trader recommend a tool to another — history, alerts, replay, aggregation — and every one of those locks is a reason a screenshot never gets posted.
A footprint chart replaces each candle with the volume that traded at every price inside it, split by which side crossed the spread. Sells that hit the bid print on the left of each level, buys that lifted the ask on the right. It answers the question a candle cannot: not where price went, but who had to pay to move it.
Start with one thing: the disagreement between delta and price. Find bars with heavy one-sided delta and almost no range, and watch what happens next. That is absorption, and it is the pattern that teaches the rest. Add imbalance stacks once you trust that, and leave the DOM until last — it moves too fast to learn on.
It is a comparison between the ask volume at one price and the bid volume one tick below, which are the two sides of the same quote. When one is three or more times the other the level is marked. Three consecutive marked levels is a stacked imbalance, which is the version worth acting on — a single one is usually noise.
Yes, and there is nothing to upgrade to. Every tool listed on this page is available to everyone with no account. It is funded by exchange affiliate links, a single sponsor slot in the right-hand rail, and donations. There is no trial, no card, and no feature that stops working later.
There is no account to make. No sign-in form exists anywhere in the product and no user record exists on any server. Your workspaces, drawings and settings save into your own browser's storage, which means they are private and also that clearing site data clears them — export a workspace file if you want a backup.
No. Klustra is a web page. It runs in Chrome, Firefox, Safari and Edge on desktop, and works on tablets. There is no installer, no extension and no desktop build, so nothing to keep updated and nothing that can be blocked by a corporate machine policy.
Binance, Bybit, OKX, Bitget, Gate.io and Hyperliquid, spot and perpetuals. Hyperliquid also carries perpetuals on gold, oil and index products, which is how order flow on those instruments is available without a CFD data subscription. Multiple exchanges can be merged into one aggregated footprint and CVD.
A footprint shows volume at price within each individual bar, so it is about sequence — what happened, in what order, at what price. A volume profile aggregates volume at price across a whole session or range, so it is about structure: where the market has agreed and where it has not. Most traders use both, on the same chart.
Years of candles for zoomed-out context, loaded from pre-aggregated files on a CDN, and real per-price footprint over the archive window plus everything your browser has streamed this session. The chart is explicit about which is which — a candle is never dressed up as a footprint bar it does not have the data for.
Yes. Price-cross alerts are checked on our server every minute and delivered by Telegram or email even with the browser closed. Order-flow conditions — delta thresholds, big trades, imbalance stacks — run in your browser, because they need the full tick stream, which by design only your machine has.
The chart reads well on a phone and is fully usable on a tablet, but order flow is a dense display and a small screen shows a lot less of it. The heavier 3D and multi-chart layouts scale themselves down on small or low-power devices so the page stays fast.