Market Depth

Market depth is the volume of buy and sell orders resting on an order book at each price level, showing how much can be traded before the price moves materially. A market with 10 million dollars of bids within 1 percent of the mid price can absorb a 10 million dollar sale with at most a 1 percent dent.

Why it matters

Depth, not price, determines what a position is really worth to a large holder, because exiting size in a shallow market destroys value through slippage. Depth also governs volatility: the same sell order that barely registers in a deep market gaps price downward in a thin one. Traders read depth charts to gauge where large resting orders sit, though displayed depth can vanish in stress, since resting orders are free to cancel.

Depth is also fragmented. Bitcoin trades on dozens of venues at once, so true depth is the sum across exchanges, plus over-the-counter desks that never display quotes publicly.

In the gold vs bitcoin debate

Gold's depth lives mostly off-screen in the London over-the-counter market, where clearing statistics show tens of billions of dollars settling daily, giving institutions enormous absorptive capacity. Bitcoin's visible order books are thinner, which partly explains its higher volatility, though its depth is transparent, global, and available around the clock rather than concentrated in dealer networks.