Market Depth Heatmaps

Market depth heatmaps are visual representations of the order book that show the concentration of limit orders at various price levels over time. By using color gradients, these heatmaps make it easy to identify clusters of liquidity that might act as magnets or barriers for price.

Traders use them to spot "spoofing" activity, where large orders are placed and then canceled to manipulate market perception. During a breakout, heatmaps can show the thinning of liquidity in the direction of the move, providing a warning of potential volatility.

They are an essential tool for high-frequency and day traders who need to react to rapid changes in the order book. By providing a clear picture of supply and demand, heatmaps offer a unique perspective on the mechanics of price discovery.

They are a modern evolution of traditional order book analysis.