Forex slippage: Slippage is the difference between the price at which an order is placed, and the one at which it is actually filled. It often occurs during highly volatile markets, during news releases or when a large order is placed and there is no interest at the desired price level to maintain the requested price. Let's say you want to buy EURUSD at 1.3000 and place the order at that price, however it is actually filled at 1.3001 – this means that there's a slippage of 1 pip.   Slippage is important because it is one of the factors, forming the transaction costs of your trading, together with spreads, swaps, and commissions. The higher the slippage you get with a particular broker, the worse, as slippage may destroy the profit potential of your trading strategy.