BasisOpen free chart

Liquidity heatmap, free.

Watch visible liquidity develop around price, then compare it with the trades that actually execute. The free Basis heatmap samples a synchronized Binance order book once per second, retaining up to 15 minutes of recorded depth while the Order Flow session is active. No account required.

Open it nowNo account · no trial · no card

What you get

  • Up to 15 minutes of rolling depth history at one-second sampling, with fit, 1m, 5m and 15m views
  • Separate bid and ask colors, adjustable price range and contrast, with price-level hover inspection
  • Intensity scaled across the visible window rather than by raw size, so a genuine wall stands out instead of the whole panel saturating
  • Executed trade bubbles, a price trace, visible-window volume profile and cumulative delta below the book
  • Sweep and liquidity-change markers for examining rapid executions, pulled, held and refilled liquidity candidates
  • Connection continuity and depth-range limits: missing observations stay visibly unknown, not zero liquidity

Why this is usually paid for

The DOM is a snapshot. A heatmap adds the time dimension: where size remained, where it changed and what happened as price approached. Reading it beside trades helps you investigate liquidity rather than treating a bright stripe as a prediction.

Basis maintains the synchronized book in your browser. This is live session recording, not a 24/7 server archive. Reconnecting can recover supported trade history, but cannot reconstruct the order book during an unobserved interval. Those two histories remain separate.

How to use it

  1. 1

    Open the heatmap

    The button below opens the terminal. In the Order Flow panel, choose the Heatmap tab. It begins capturing from the moment you open it, so give it a minute before you read anything into the picture.

  2. 2

    Look for size that persists

    Follow a bright band over time and compare it with surrounding depth. Persistent displayed size is different from a brief addition, but both can change or cancel. Public level-two data does not reveal intent, order ownership or all hidden liquidity.

  3. 3

    Watch what happens when price arrives

    Compare price progress, nearby prints and changes in displayed size. Executions while a level holds can support an absorption or replenishment hypothesis. A dark band can also reflect canceled orders, a range limit or missing depth. Check coverage before interpreting the event.

  4. 4

    Read it with the footprint, not instead of it

    The heatmap shows orders that have not traded and the footprint shows trades that have. Together they answer the question neither answers alone: was the level defended, and did the defence cost anything.

Questions

How much history does the heatmap hold?+

Up to 15 minutes: at most 900 one-second depth samples from the active Order Flow session. The picture builds from connection time; it is not an archive of yesterday. Genuine disconnections or unavailable depth are shown as gaps, not filled with invented history.

Does the heatmap need an account or a trial?+

Neither. The core heatmap opens on a live market without a trial or paid charting tier. An optional account saves your work, while Founders membership adds separate research features rather than changing this live heatmap.

Why does the picture only start when I open the panel?+

Because the heatmap is built from a book your own browser is maintaining, and that book starts when you connect. Nothing is being withheld and no history is being sold separately — the data simply did not exist on your machine before you opened it.

Is a bright band on the heatmap a reliable level?+

Only until it is cancelled. Resting orders are not commitments and large ones are pulled routinely, which is exactly why watching them over time is more useful than a single snapshot of the ladder. Treat persistence as the signal, not brightness on its own.

Which market does the heatmap use?+

Binance spot and USD-M markets. The DOM and heatmap share the synchronized depth book; the tape has a separate trade stream. Select the market you actually analyze: spot and perpetual liquidity are not interchangeable, and a live trade stream does not guarantee uninterrupted depth coverage.

Open it and see

The chart opens with this already turned on. Nothing to configure, nothing to sign up for.

Open the chart

Learn what you are looking at

Each of these explains the calculation this platform actually performs, and where the reading misleads.

Cumulative Volume Delta: which side actually lifted the marketHow CVD separates aggressive buying from aggressive selling using taker data, and why it is a genuinely different measure from every bar-based volume indicator.Net Volume: signed volume per bar, without accumulationHow net volume separates buying from selling volume on each bar, and why it is more honest than the cumulative alternatives.

Or ask your AI, on live data

Give ChatGPT the live crypto market.ChatGPT can't see today's crypto market. Add Basis as a custom MCP server and it reads live prices, order flow, funding, liquidations and whale positions. No API key.Give Claude the live crypto market.Add Basis as a custom connector and Claude reads live crypto prices, order flow, funding and whale positions, then builds the chart. Works on the Free plan too.

Also free

Depth of market, free.A live level-two order book ladder on crypto perpetuals and spot, free with no account. Watch resting bids and offers, the spread, and the size sitting at every price.Time and sales, free.A free live Binance trade tape with price, size, aggressor side, large-print filters and rolling flow context. Read executions beside the DOM and heatmap.Absorption and imbalance, found for you.Stacked imbalances, confirmed delta divergence and measured absorption candidates on Binance crypto markets. Free order-flow analysis with visible rules and coverage.

Updated 2026-10-12 · All free tools · AI guides · Indicator reference · Documentation · Terminal