Depth Heatmap

Visualize order book depth over time as a heatmap overlay, revealing hidden support and resistance walls that standard charts cannot show.

What is Depth Heatmap?

Depth Heatmap renders real-time order book depth as a color-coded heatmap directly on your price chart. At every price level, the heatmap shows how much resting limit order volume is sitting in the order book — and how that liquidity shifts over time. Bright, intense areas indicate dense liquidity (large resting orders), while dark areas indicate thin order book depth where price can move quickly with minimal resistance.

Unlike a standard depth chart that only shows a single snapshot, the Depth Heatmap paints a continuous picture across time. You can see bid walls forming and dissolving, ask walls stacking up ahead of key levels, and how the overall liquidity landscape changes as price moves. This time dimension is what makes it powerful — a wall that has been sitting at a level for hours carries more weight than one that appeared minutes ago.

Large clusters of bid volume below the current price act as support — buyers are willing to absorb selling pressure at those levels. Dense ask volume above acts as resistance — sellers are ready to fill buy orders before price can break through. However, walls can be spoofed: large orders placed to create the appearance of support or resistance, then pulled before they are filled. Learning to distinguish genuine walls from spoofed ones is a key skill.

Key Concepts

• Bid Walls (Below Price): Dense clusters of resting buy orders that act as support — bright bands below the current price indicate levels where significant buying interest is waiting
• Ask Walls (Above Price): Dense clusters of resting sell orders that act as resistance — bright bands above the current price indicate levels where selling pressure will meet any rally
• Color Intensity: Brighter areas represent higher order volume concentration at that price level. Dark areas represent thin liquidity where price can move rapidly
• Time Dimension: The heatmap extends horizontally across time, allowing you to see how liquidity builds, shifts, or disappears at specific price levels
• Spoofing: Large orders placed to influence other traders’ behavior that are pulled before execution — walls that appear and vanish quickly may be spoofed
• Liquidity Voids: Dark gaps in the heatmap where very little order book depth exists — price tends to move quickly through these zones

How to Use Depth Heatmap

1. Open Chart from the sidebar and navigate to the overlay settings
2. Enable the Depth Heatmap overlay
3. The heatmap renders directly on the price chart — bright bands indicate dense liquidity, dark areas indicate thin order book
4. Look for persistent bright bands below price (bid walls = support) and above price (ask walls = resistance)
5. Watch how walls behave as price approaches them — genuine walls hold, spoofed walls disappear

What to Look For

• Bullish signals: A thick, persistent bid wall forming below the current price that holds for an extended period suggests genuine buying interest. When price dips into a bright bid zone and bounces, it confirms strong support. Ask walls above price thinning out or being pulled indicates resistance is weakening before a potential breakout.
• Bearish signals: Dense ask walls building above the current price that remain firm as price approaches indicate strong resistance. Bid walls below price being pulled or thinning out suggest that support is being withdrawn and a breakdown may follow. A bright ask wall that absorbs multiple buying attempts without moving signals distribution.
• Key patterns: Liquidity voids — dark gaps in the heatmap — are zones where price can move rapidly due to the absence of resting orders. Price tends to “jump” through these gaps. When a wall is tested multiple times and holds, the level gains significance. When a wall is tested and suddenly disappears (pulled), it was likely spoofed and price may reverse. Stacked walls at round numbers often coincide with psychological support/resistance.
• Combine with: Limit Order Heatmap to see specifically where limit orders are clustered over time, Trade Footprint to see if aggressive volume is actually trading at the wall levels, OI Delta to determine if new positions are being opened at key depth levels

Supported Exchanges

Tips

• Walls that have been resting at a level for hours are more likely to be genuine than walls that appeared in the last few minutes — use the time axis to assess wall age
• Spoofed walls are common in crypto markets — if a large wall appears right before price reaches it and then vanishes, treat it as a manipulation signal rather than genuine support or resistance
• Dark zones (liquidity voids) above or below the current price are key areas to watch — if price enters a void, expect fast movement through it until it reaches the next bright cluster
• DCT Alpha also offers a separate Liquidity Heatmap tool for a standalone, full-screen view of order book liquidity — use Depth Heatmap for quick overlay analysis and Liquidity Heatmap for deep-dive sessions
• Combine Depth Heatmap with volume analysis to confirm whether walls are being traded into or simply sitting passively