In trading, the spread refers to the difference between the bid and ask price of a security or asset. The bid price is the highest price a buyer is willing to pay for a security, while the ask price is the lowest price a seller is willing to accept. The spread is the difference between these two prices and represents the cost of buying or selling a security. In the context of cryptocurrency trading, the spread can refer to the difference in price between different exchanges or trading platforms. It can also refer to the difference in price between different cryptocurrencies.

Dr Steve