Issue 18 of the Little Classroom｜What is Slippage? Old Sun explains it clearly in simple terms------the price you see when placing an order may be different from the actual execution price. For example, you might think you can buy at 1 dollar, but the execution price turns out to be 1.02 dollars, resulting in an extra 0.02 dollars paid, which is slippage. Slippage is not being "scammed", but a natural result of market mechanisms, mainly due to two reasons.