How to add gamma levels to Bookmap

Overlay today's Gamma Axis levels on Bookmap's heatmap so you can watch liquidity build or vanish exactly where the gamma walls sit.

Bookmap is the natural home for gamma levels because its whole value is seeing liquidity in real time — and a gamma wall is a prediction about where liquidity and resistance should cluster. Overlay today's Gamma Axis levels on the heatmap and you can watch, live, whether real orders actually stack up at the call wall or thin out through the flip. This guide uses the universal import method: horizontal lines, placed in a couple of minutes, no add-on required.

What you need before you start

You need today's levels and a Bookmap chart on the matching instrument. Open the Gamma Axis dashboard, copy the levels for ES or NQ, and have Bookmap running on that same contract so the lines sit on the liquidity you're actually watching.

Add the levels as horizontal lines

Bookmap supports horizontal lines directly on the chart, which is all you need to pin each gamma level onto the heatmap. Place one line per level and label it so you can read the map while the order flow moves.

Copy today's values for your instrument from the dashboard, keeping each price next to its name.
Use Bookmap's drawing tools to add a horizontal line at each price and set the exact value.
Label each line — "Call wall", "Put wall", "HVL flip" — and colour the walls separately from the flip.
Keep the lines thin so they don't hide the heatmap underneath; the point is to see liquidity relative to the level.
Save your workspace so the lines reload with your layout.

What to actually watch for

The payoff of this overlay is confirmation or divergence between the gamma map and the real book. Watch whether resting liquidity thickens into a wall as price approaches it, whether it pulls away as price nears the flip, and whether absorption shows up on the heatmap exactly at a level. The gamma level tells you where to look; Bookmap tells you what's happening there. If you want the mechanics behind why those prices should matter, see gamma walls, GEX magnets and the HVL flip explained.

Refresh every morning

Replace the levels before every session — they're rebuilt daily from the latest options positioning, so a line left over from yesterday is just noise on the heatmap. Clear the old lines, paste today's values, and you're set in about two minutes.

FAQ

Is there a Gamma Axis add-on for Bookmap?

No dedicated add-on today. You place the daily levels as horizontal lines — the values are identical to any native indicator.

Why put gamma levels on Bookmap specifically?

Because Bookmap shows real liquidity in real time, so you can see whether the book actually reacts at each gamma wall and the flip instead of assuming it.

Will the lines clutter the heatmap?

Keep them thin and colour-coded. The goal is to read liquidity relative to each level, not to cover it.

Do I redraw them daily?

Yes — the levels change every day with the options positioning, so refresh before the open.

For every other platform and the two methods side by side, see the pillar guide: how to set up gamma levels in your trading platform.