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What Is Slippage in Forex? (And How to Minimize It)
Slippage is the friction tax of fast markets. You can't eliminate it, but you can dramatically cut it down — most retail traders just accept what they get and never think about it again.
Slippage is the difference between the price you intended to trade at and the price you actually got filled at. You click buy EUR/USD at 1.0850. By the time the order reaches the server and gets matched, the market has moved to 1.0852. You're filled at 1.0852, not 1.0850. That 2 pip difference is slippage. It can go in your favor (positive slippage) or against you (negative slippage), but it almost always feels worse than it actually is because the negative ones stick in your memory.
Slippage happens for one fundamental reason: price moves faster than your order can travel through the system. Between clicking buy and the broker matching your order, milliseconds pass. In a quiet market, those milliseconds don't matter — the price is essentially stable. In a fast-moving market (during news, around major levels, in the first minute of a session), price can move several pips in those milliseconds, and you get filled wherever it landed when your order arrived.
The biggest slippage events happen during major news. When NFP prints at 8:30am ET on the first Friday of the month, EUR/USD can move 30-50 pips in under a second. If you placed a market order to enter at "the current price," you'll get filled wherever the market is when your order touches the server — possibly 20 pips away from where you clicked. Stop losses placed during news can also slip badly. A stop set at 1.0850 might get filled at 1.0830 if price gapped through.
How to minimize slippage. First, use limit orders instead of market orders for entries. A limit order says "only fill me at this price or better" — if the market moves away, the order doesn't fill at all, but you never get a worse price than you asked for. Second, avoid trading the first 30 seconds after major news releases. Third, use a regulated ECN broker with fast execution and good liquidity providers. Fourth, set guaranteed stops on positions you'll hold through high-impact events (small extra cost, but eliminates slippage on the stop). Fifth, never market-trade an exotic pair during the Asian session — slippage on USD/MXN at 3am Tokyo time is brutal.
The Candleread desk's accepted slippage budget on major pairs during normal hours is roughly 0.5 pip average. Anything consistently worse means the broker is slow, the strategy is trading at bad times, or both. Track your actual slippage over 50 trades and you'll see the pattern immediately.
Key takeaways
- ✓Slippage = difference between intended and actual fill price
- ✓Caused by price moving faster than orders can travel
- ✓Worst during news, session opens, and on exotic pairs
- ✓Limit orders eliminate slippage on entries (at cost of fill probability)
- ✓Track slippage over 50 trades to spot broker problems
Frequently asked
Is slippage always bad?+
No. Slippage can be positive too — sometimes you get filled at a better price than you clicked. Over many trades, positive and negative slippage tend to roughly balance out on a clean broker. If your broker only ever slips you in the bad direction, that's a problem.
Can I avoid slippage entirely?+
Yes, with limit orders for entries and guaranteed stops for exits. The trade-off is that limit orders sometimes don't fill (the market moves away from your price), and guaranteed stops cost a small extra fee. Most pros accept tiny average slippage in exchange for the convenience of market orders.
Why is slippage so much worse during news?+
Because liquidity providers pull their bids and offers when uncertainty spikes. With fewer market participants quoting prices, the gap between bid and ask widens, and orders get matched at whatever's left. This is also why spreads blow out during news — same root cause.
Does slippage affect prop firm challenges?+
Yes — and it can be brutal. If your stop slips 5 pips during news and that pushes you over the daily loss limit, you can fail a challenge through no fault of your strategy. Smart prop traders avoid news entirely or hedge with limit orders to control the worst outcomes.