Spread
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Key Takeaway
The difference between the lowest ask price and the highest bid price for a cryptocurrency on an exchange, representing the immediate cost of executing a trade at current market prices.
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What Is Spread?
The difference between the lowest ask price and the highest bid price for a cryptocurrency on an exchange, representing the immediate cost of executing a trade at current market prices.
How Spread Works
Frequently Asked Questions
What is the spread in crypto trading?
The spread is the difference between the lowest ask price — what sellers are currently offering — and the highest bid price — what buyers are currently offering — for a cryptocurrency on an exchange. It represents the immediate cost of executing a trade at market prices. If you buy at the ask and sell at the bid without any price movement in between, you lose the spread. A narrow spread signals a liquid market; a wide spread signals lower liquidity or higher uncertainty. The spread is present on every trading pair but varies in size significantly across different assets and market conditions.
Why does the spread matter when I trade crypto?
The spread is a real cost on every market-order trade, even if it is not shown as a separate fee. When you buy at market, you pay the ask. When you sell at market, you receive the bid. The difference between those two prices — the spread — is what you immediately lose in the round trip. In liquid markets with tight spreads, this cost is small. But in lower-volume tokens, the spread can be one or two percent or more, making the asset move significantly just to break even. Being aware of spread width before trading helps you choose appropriate order types and manage your overall trading costs more accurately.
Why do spreads widen during volatile market conditions?
Market makers — participants who provide liquidity by placing both buy and sell orders — profit from the spread. During periods of high volatility, the risk of holding inventory increases dramatically, as prices can move sharply against their positions. To compensate for this elevated risk, market makers widen the gap between their bid and ask quotes, increasing the spread. This means that precisely when many traders want to execute quickly — during a sharp price move — the spread widens and the cost of immediate execution increases. This is an important dynamic to understand when using market orders during high-volatility events.
Common Misconceptions About Spread
The spread is the only trading cost I need to worry about on a crypto exchange.
The spread is one of multiple trading costs. Most exchanges also charge explicit transaction fees — maker fees for limit orders and taker fees for market orders — on top of the spread. Additionally, for large trades, slippage adds further cost as your order moves through multiple price levels in the order book. For derivatives or margin trading, funding rates and borrowing costs apply. A complete picture of trading costs must account for all of these components together, not just the spread in isolation.
A narrow spread means I will always get a good execution price.
A tight spread between the best bid and ask is a positive sign of market liquidity, but it only guarantees a good execution price for small orders. If your order size is large relative to the available quantity at the best ask or bid, your order will consume multiple price levels to fill completely — each level potentially at a worse price than the last. This price impact from order size is slippage, which is distinct from the spread. Large orders can experience significant slippage even in markets with consistently tight spreads.
The spread is a fee charged by the exchange to traders.
The spread is not a fee collected by the exchange — it is the natural gap between what buyers offer and what sellers ask, determined by market participants. In many markets, it is captured by market makers — firms or individuals who actively quote both bid and ask prices to provide liquidity and profit from the difference. Exchanges do charge their own separate transaction fees on top of the spread. Some platforms advertise zero-commission trading, meaning no explicit fee, but the spread still applies and remains the embedded cost of every market-order transaction.