Depth Chart

A depth chart is a visual display of an exchange's order book, showing the cumulative quantity of buy orders and sell orders waiting at each price level. Bids stack up on one side, asks on the other, and the point where they meet is the current market price. The steeper the walls, the more volume it takes to move the price, so a chart reader can gauge liquidity at a glance.

Why it matters

Depth is the practical measure of liquidity. A market can show a tight quoted spread yet hold very little size behind it, so a large order crashes through many price levels and suffers slippage. Traders read depth charts to estimate how much they can buy or sell without moving the market, and to spot large resting orders, sometimes called walls, that may act as short-term support or resistance.

Depth can also mislead. Orders can be placed and cancelled in milliseconds, and a practice called spoofing posts large fake orders to create the illusion of demand. Regulators have fined traders in both traditional and crypto markets for it.

In the gold vs bitcoin debate

Depth charts make bitcoin's market structure unusually transparent: anyone can watch the live order book on a public exchange. Gold's deepest market, London over-the-counter trading, publishes no comparable real-time book, so participants infer depth from dealer quotes. Bitcoin skeptics counter that visible depth on crypto exchanges can be thin and fragmented, while gold's opaque market is nonetheless enormous.