In cryptocurrency trading, the technology most commonly employed is blockchain. Blockchain is a distributed, decentralized ledger that records transactions across multiple computers, ensuring transparency, security, and immutability. It enables participants in a trading network to verify transactions without the need for a central authority. Additionally, blockchain enhances trust among users, as every transaction is permanently recorded and publicly accessible, reducing the risk of fraud. Smart contracts running on blockchain platforms automate trading processes by executing agreements when predetermined conditions are met. Overall, blockchain technology is fundamental for cryptocurrency exchanges, ensuring secure and efficient trading.