Slippage
Slippage is the difference between the price a trader asked for and the price the order filled at.
Definition
Slippage is the difference between the price a trader asked for and the price the order filled at.
It is largest in fast markets, around news, and when few orders rest near the price. A gap on the chart is often a place where it happens.
The gap measures on this site come from candles, and no candle shows what an order would have filled at.