Liquidity is how easily an asset can be bought or sold without significantly moving its price.
Analogy: The US dollar is maximally liquid — exchange any amount instantly at a stable rate. A house is illiquid — selling takes months, price is uncertain.
Liquid crypto: BTC on Binance — buy $10M in seconds without significant price impact. Illiquid: unknown altcoin — buying $5,000 moves the price 5%.
How Liquidity Is Measured
24h Trading Volume
| 24h Volume | Liquidity | For arbitrage |
|---|---|---|
| > $500M | Very high | BTC, ETH — ideal |
| $50M–$500M | High | SOL, BNB — good |
| $5M–$50M | Medium | Altcoins — careful |
| < $500K | Very low | Avoid for arbitrage |
Order Book Depth
Volume of orders within ±2% of current price. Shows how large a trade you can execute without significant price movement.
Bid-Ask Spread
Narrow spread (0.01–0.05%) = high liquidity. Wide spread (0.5–3%) = low liquidity.
Why Liquidity Matters for Arbitrage
Slippage. On illiquid pairs, large orders consume multiple price levels — actual fill price worse than displayed. This makes attractive spreads unprofitable.
Illusory spreads. Coins with very large inter-exchange spreads are often illiquid. The spread isn't an opportunity — it's because nobody trades there and prices are stale.
How to Check Coin Liquidity
- Open the pair on an exchange and examine the order book — how much volume in the first 5–10 levels?
- Check 24h volume on CoinGecko or SpreadScan. Minimum $5–10M for reasonable trading.
- Check the bid-ask spread. If > 0.1% — be cautious.
- Check across multiple exchanges. Only on 1–2 obscure exchanges = limited liquidity.
Open SpreadScan with volume filter →
FAQ
Can liquidity change significantly? Yes. During panic or euphoria, volumes increase dramatically. In "quiet" periods — they fall. Liquidity also depends on time of day.
Why are altcoins less liquid? Fewer market participants, fewer market makers, fewer arbitrageurs equalizing prices. Result: wider spreads and thinner books.