Slippage

Slippage is the difference between the expected price of a trade and the price at which the trade is actually executed, most commonly occurring in fast-moving markets, during periods of high volatility, or when executing large orders where liquidity is insufficient to fill the order at the requested price. This discrepancy results from the time delay between the moment an order is placed and the moment it is filled, causing the execution price to "slip" away from the quoted price.