Those four numbers drop the part that matters: where the resting volume sits, who pulled their orders just before price arrived, and which print ate a whole level.

The heatmap redraws the entire order book over time. Bright bands are liquidity waiting; dark gaps are where it just went.

The TapeHawk chart: a BTCUSDT liquidity heatmap on the 5-minute window, red and green trade bubbles, price ladder on the right

Six things you use every session

One data stream, not six separate tools bolted together.

Liquidity heatmap

The whole order book over time, smoothed on the GPU. You see the wall before price reaches it.

Footprint

Buy and sell volume split per price level, with imbalances marked.

CVD and liquidations

Server-anchored cumulative delta, with live liquidation bubbles.

Your own indicator language

Write an indicator in a single file. The browser compiles it to WASM and runs it.

@indicator sma
@kinds candles, footprint
@render overlay

input len = 50, min 1, max 1000
input color = color "#42a5f5"

plot line = sma(close, len), color color

One .ind file, compiled to WASM, running on the chart

Alerts that follow the marks

Set a rule on the indicator itself. It fires when the mark appears on the chart.

Session replay

Play a historical window back at its real pace to practise reading order flow.

The rest of the workspace

Seven more things the chart does, photographed from the running app. Each one opens its page in the docs.

The full sheet

Everything in the chart today, by group. A group name opens its docs.

Chart types: Liquidity heatmap with a live order-book ladder
Footprint with stacked imbalances and a value area
Candles in ten shapes, Renko and Heikin Ashi included
Trade bubbles sized by volume
Footprint drawn over the heatmap
A phone layout of its own
Your colours and your timezone
Order-flow indicators: Big Trades
Sweeps
Absorptions
Stop Runs
Volume Spikes
Liquidity Changes
Book Imbalance
Stop Volume
Market Volume Imbalance
CVD
VPOC
Volume Profile
Classic indicators: EMA
SMA
WMA
HMA
DEMA
TEMA
VWAP
Bollinger Bands
Supertrend
Parabolic SAR
Ichimoku Cloud
RSI
MACD
Stochastic
ATR
OBV
WorkspaceFree account: Layouts of two or four panels
Ten drawing tools, with a magnet
Up to 20 saved layouts, on every device
A favourites list of up to 50 symbols
Practice: Bar replay from 0.5x to 25x, every panel together
Paper trading with stops, targets and fees
MAE, MFE and results in R
A trade journal with statistics and export
AlertsFree account: Price alerts placed on the chart
Signal alerts on an indicator's marks
The bell and desktop notifications
20 rules for each account
Your own indicatorsFree account: An indicator language that fits in one file
A block builder that needs no code
A source editor that points at the error
Compiled to WASM and run in your browser
Eight worked examples to start from

What a free account adds

The chart is open to everyone. An account keeps your work and opens the rest.

Without an account

The whole chart on one panel. Nothing is saved when you leave.

Heatmap, footprint and every candle shape
Every built-in indicator
Bar replay and paper trading

With a free account

Everything a visitor has, and six things more.

Kept for you

Saved layouts, on every device
Drawings, saved for each symbol
A list of favourite symbols

Opened up

Layouts of two and four panels
Price alerts and signal alerts
Indicators you write yourself

Create free account Open the chart

Free, no card. Panels, alerts and your own indicators switch on once you confirm your email.

Three steps

Nothing to install, no card. The chart opens before you log in.

Open the chart
Pick a venue and a pair. Data arrives immediately, no account needed.
Turn on the layers
Heatmap, footprint, CVD or an indicator. Add and remove them on the panel.
Set an alert
Log in to save layouts and get alerts by bell or email.

One free account, the whole workspace

No card and no trial clock. Or open the chart first, and sign up when there is something you want to keep.