Module 1 · The Heatmap
Reading Walls
Stacked liquidity as support and resistance.
In this lesson you'll
- Identify walls (bright bands) on the heatmap
- Use bid walls as support, ask walls as resistance
- Understand why large players rest in size
A wall is a bright horizontal band — a large stack of resting limit orders at one price. A heavy band of resting bids below price can act as support; a heavy band of resting offers above price can act as resistance.
Why it matters: large participants typically work through limit orders (to avoid paying the spread and moving the market against themselves), so zones where their resting orders concentrate become significant levels. When price bounces repeatedly off a heavy bid band, that zone is acting as support.
Key takeaways
- A wall = a bright band = large resting limit orders at a price.
- Resting bids below price = potential support; resting offers above = potential resistance.
- Large players rest in limit orders, so their concentrations become key levels.
- A wall must prove itself (hold / get traded into) before you trust it.
Check your understanding
Pick an answer to reveal instant feedback. Answer every question to complete the lesson.
Why that's off: Support comes from resting BIDS below price.
Why that's off: A naked POC is a volume-profile concept, not a resting-liquidity band.
Why that's off: A wall of offers above is a potential ceiling, not a buy signal.
Resting offers above price are sellers waiting; that stacked liquidity tends to cap rallies, acting as resistance. Resting bids below price act as support.
Why that's off: Limit orders are normal and legal.
Why that's off: Limit orders rest passively; they don't move price until hit.
Why that's off: Concentrated resting liquidity is exactly what the heatmap is for.
Large participants use limit orders to avoid paying the spread and tipping their hand; where those orders concentrate becomes a level they're effectively defending — potential support/resistance.
Educational content only. Nothing here is financial or trading advice. Order-flow and options patterns shift probabilities; they never guarantee outcomes.