Order Book Liquidity Supports Bitcoin’s August Rally Above $80,000

Bitcoin $BTC $78,535.13 jumped nearly 25% last week to move above $80,000, marking its best weekly performance in more than three years. The rally was supported by several catalysts, including strong ETF inflows and the U.S. Treasury’s bond buyback announcement.

A less closely watched factor also adds context to the move: order book liquidity, also known as market depth. Market depth measures how easily large orders can be executed without sharply changing prices. When a rally occurs alongside strong liquidity, it suggests that real capital is flowing into the market in size. When liquidity is thin, by contrast, a rally can be driven by a small number of large orders that disproportionately move prices.

In Bitcoin’s case, the recent advance took place against a backdrop of elevated liquidity, according to data from major exchanges tracked by CoinDesk Research. That matters because deep order books can help absorb demand without forcing outsized price gaps, a dynamic especially relevant during periods when many markets typically see lighter trading.

The average 0.5% market depth across major spot exchanges — the combined value of buy and sell orders placed within 0.5% of the current price — was about $9.6 million in $BTC on Aug. 18, the day the rally began from around $64,000. That level was close to the $9 million record seen on Jan. 1, when $BTC traded near $88,000, and above the $8 million level recorded in October when $BTC traded at record highs above $120,000.

By Aug. 25, when $BTC reached $80,000, the same 0.5% depth had eased slightly to $8.7 million, but remained within normal variance. The 1% and 2% market depth readings showed broadly the same pattern.

“In dollar terms, top-of-book liquidity was broadly stable across the rally - marginally softer on the 25th but well within normal snapshot variation, with no meaningful thinning within 0.5% of mid before or after,” CoinDesk Research said. “So the ~24% move to $80K looks consistent with genuine demand being absorbed rather than a sudden low-liquidity air pocket.”

The finding is notable because August is typically the thinnest month for liquidity in both crypto and traditional finance, as trading desks reduce activity during the Northern Hemisphere summer. The fact that depth held steady through that period, while Bitcoin rose about 25%, supports the view that the buying was absorbed at scale rather than occurring in a hollow market.

Ether and solana showed a similar pattern in their respective order books, with 0.5% higher depth on Aug. 25 than in October. Together, the readings suggest the recent move was not isolated to bitcoin alone, but part of a broader improvement in spot-market liquidity across major crypto assets.