What is Bid-Ask Spread

The bid-ask spread is the difference between the highest price a buyer is willing to pay (the bid) and the lowest price a seller is willing to accept (the ask) for a cryptocurrency at any given moment. It is one of the most fundamental concepts in trading and directly affects your costs every time you execute a market order.

UNDERSTANDING BID AND ASK

Bid Price: The highest price any buyer currently in the order book is willing to pay. If you are selling crypto immediately (market sell order), this is the price you receive.
Ask Price (or Offer): The lowest price any seller currently in the order book is willing to accept. If you are buying crypto immediately (market buy order), this is the price you pay.
Spread: Ask Price Bid Price. Example: Bitcoin bid $92,000, ask $92,050 spread = $50.

WHY THE SPREAD MATTERS

The spread represents an immediate hidden cost in every market order execution. When you buy at the ask and sell at the bid, you are paying the spread twice for a round trip (buy then sell) even if the price hasn't moved. For a $50 spread on a $92,000 Bitcoin, the round-trip cost is approximately 0.054% of trade value on top of any exchange commission fees.

WHAT AFFECTS SPREAD SIZE

Liquidity: High-volume assets like Bitcoin and Ethereum have very tight spreads (often $1–10) on major exchanges because many buyers and sellers are active simultaneously. Low liquidity assets small altcoins, newly listed tokens can have spreads of 1%–5% or more.
Time of Day: Spreads widen during low-activity hours and tighten during peak trading sessions.
Market Volatility: During major price moves, spreads widen as uncertainty increases and market makers pull orders.

MAKER VS TAKER FEES AND SPREADS

Traders who place limit orders (adding liquidity) are "makers" and typically pay lower or zero fees. Traders who fill existing orders (market orders) are "takers" paying the spread plus exchange fees. Using limit orders set between the bid and ask is the most cost-efficient execution strategy.

Terms in addition to the Bid-Ask Spread

Blockchain

A blockchain is a subset of a distributed database. The Bitcoin inventors originally prototyped the system in 2008. This modern database is made up of separate blocks that are connected together in a chronological chain. Blockchains may be used to store a wide range of data types. It has mostly been utilized as a public ledger for bitcoin transactions to date. A peer-to-peer network comprised of independent nodes uses a consensus process to ensure the blockchain's security and legitimacy. Each node in the network keeps a public and immutable copy of the data.

2 Factor Authentication (2FA)

2 Factor Authentication is a security measure with two layers. It is used by the majority of cryptocurrency exchanges. To log in, you must provide not only a password, but also a code obtained, for example, from the Google authenticator.

Airdrop

An airdrop is a method of distributing coins. End users can typically obtain coins for free or in exchange for doing a small task, such as subscribing to a newsletter, sending a tweet, or inviting others via a personal affiliate link. Cryptocurrency airdrops — the act of depositing cryptocurrency into public crypto wallets — are utilized as a marketing, liquidity creation, and network bootstrapping technique for many different types of blockchain initiatives.

Altcoin

Altcoin - "alternative coin" - is any kind of digital currency other than Bitcoin. Since the launch of Bitcoin, the world's first digital currency, many altcoins (as well as supporting blockchains) have been created. Altcoin digital currencies share many similarities to Bitcoin, but consistently and have significant differences. There are about 20,000 altcoins, and this number is expected to grow significantly in the coming years. Altcoins often develop Bitcoin features. Ethereum, currently the most widely used blockchain, supports digital contracts and separate applications where Bitcoin does not. Altcoins are also often created to cater to the needs of different users. The Litecoin blockchain, for example, can process payments quarterly for the duration of Bitcoin.

Cold Storage

Cold storage is the way to store cryptocurrency offline. The word refers to the use of offline wallets that are not connected to the internet. Cold storage is the most secure way to keep cryptocurrencies since an offline currency becomes less likely to be hacked and stolen. Paper wallets, printed renditions of private keys, and offline hardware and software wallets are all examples of cold storage.