Liquidity heatmap, free.

What you get

• The live book sampled twice a second and drawn as a time axis, so liquidity has a history rather than only a present
• Bids and offers coloured separately, so you can see which side is defending
• Intensity scaled across the visible window rather than by raw size, so a genuine wall stands out instead of the whole panel saturating
• A price axis on the panel, so a bright band is a level you can act on rather than a vague region
• The tape and the ladder alongside it, so you can tell absorbed size from cancelled size

Why this is usually paid for

A liquidity heatmap is the single most recognisable paid feature in order flow software. It is expensive to serve because it means keeping a full book per user per symbol and streaming the result, and it is visually striking enough that people will pay for it on sight.

Basis moves that cost to where it is free: your browser already holds a synchronised book for the DOM, so sampling it into a heatmap costs nothing extra on our side. That is the whole reason this is not behind a tier — not generosity, just that there is no bill to pass on.

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

   A bright band that survives several seconds of price moving towards it is a real resting order. A band that appears and vanishes in the same breath is someone flashing size they never intended to fill, and it tells you about intent rather than about liquidity.

3. 3

   Watch what happens when price arrives

   The informative moment is contact. Size that goes dark while the tape prints heavily was absorbed — someone filled into it. Size that goes dark with no prints was cancelled. The first is support, the second was never support at all.

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

Also free