What is Slippage in Forex Trading?
Slippage is the difference between the price you expect when submitting an order and the price at which your order actually executes. It can be positive (better than expected) or negative (worse).
How It Works
Slippage happens because markets are constantly moving. In the milliseconds between you clicking 'buy' and your order reaching the liquidity provider, the price may have shifted. During high-impact news events, slippage can be significant because prices move faster than orders can be processed. Low-liquidity conditions (Asian session for European pairs, exotic pairs, pre-market hours) also increase slippage risk because there are fewer orders in the book to fill against. Broker execution technology matters. Direct market access (NDD) brokers route orders to multiple liquidity providers, which generally reduces slippage compared to a single counterparty.
Why It Matters
Slippage is a hidden cost that doesn't appear in the advertised spread. Over hundreds of trades, consistent negative slippage erodes your edge. Choosing a broker with fast execution and deep liquidity is one way to reduce this cost.
Common Mistake
Trading during major news releases and then attributing all the slippage to the broker. During NFP or FOMC announcements, liquidity thins and prices gap. Slippage in these conditions is a market structure issue, not an execution issue.
Example
You set a stop loss on XAU/USD at $2,050.00. During an unexpected Fed announcement, gold drops sharply and your stop fills at $2,049.20. That's 80 cents of negative slippage, roughly 8 pips in gold terms (where 1 pip = $0.10).
Stoic Insight
The Stoics distinguished between what is within our control and what is outside it. Slippage falls outside your control, but choosing which sessions to trade and how to size around news events falls within.
Related Terms
Ready to Trade?
Apply what you've learned on a demo or live account with StoicFX.