Is slippage the same as a wide spread?

No. The spread is the gap between bid and ask at the moment you look at the price. Slippage is the difference between the price you clicked (or your stop/limit price) and the price your order actually filled at, once it reaches the market. You can have a tight spread and still get slipped, especially in fast markets.

Can slippage ever work in my favour?

Yes — this is called positive slippage, where you get a better price than requested (e.g. a buy fills lower than you asked). It happens less often than negative slippage in practice, particularly around news, but it's worth tracking both directions so your log reflects reality rather than just the bad days.

Do market orders slip more than limit orders?

Generally yes. A market order says 'fill me now at whatever price is available', so it's exposed to whatever the market is doing that instant. A limit order only fills at your price or better, so you avoid negative slippage on entry — but you risk not being filled at all if price moves away.

Does ECN or raw-spread account type reduce slippage?

It can, because these accounts typically route to deeper liquidity pools, but it's not automatic. Execution quality depends on the broker's infrastructure, your instrument, and market conditions at the time. Check a broker's execution stats and your own logs rather than assuming an account label guarantees better fills.

How much slippage is 'normal'?

There's no single number — it varies by pair, session, and volatility. The point of measuring is to build your own baseline so you can spot when something is off (for example, average slippage suddenly doubling) rather than comparing yourself to a generic industry figure.

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What Slippage Really Costs You (And How to Measure It)

Updated 31 July 2026 · 7 min read · PipTax education

Slippage cost is one of the most underestimated drags on a trading account — it doesn't show up on your broker's fee page, yet it quietly eats into every strategy that relies on precise entries and exits. Most traders can quote their spread and commission from memory but have no idea what slippage is actually costing them each month. This guide shows you what slippage is, why it happens, and — most importantly — a simple workflow to measure it yourself using your own trade history.

What Slippage Actually Is

Slippage is the difference between the price you requested and the price your order actually filled at. It happens because prices move between the moment you send an order and the moment it reaches the market and gets matched.

There are two directions:

Negative slippage — you get a worse price than requested (buy higher, sell lower). This is the one that costs you.
Positive slippage — you get a better price than requested. This helps you, though it's less common in practice.

Slippage is different from spread. Spread is the gap between bid and ask *right now*; slippage is what happens to your specific order *between click and fill*. You can trade with a tight spread and still be slipped badly if the market is moving fast or liquidity is thin at that moment.

It's also different from a requote. A requote is when a broker refuses your price and asks you to confirm a new one before filling — common on older instant-execution models. Slippage, by contrast, fills your order automatically at the next available price, no confirmation needed.

Why Slippage Happens

Slippage isn't a broker trick — it's a function of how markets and execution actually work. Common causes include:

Fast-moving markets — during news releases or sudden volatility, prices can move several pips in the time it takes an order to route and fill.
Thin liquidity — at market open, during low-volume sessions, or on exotic pairs, there simply may not be enough volume at your requested price.
Order size — a large order can eat through several price levels before it's fully filled, especially with market execution.
Execution model — instant execution rejects or requotes when price moves; market execution fills at the best available price, which is where most slippage shows up.
Latency — the physical and technical distance between your platform, the broker's server, and the liquidity provider all add tiny delays where price can move.

None of this means slippage is random or unmanageable. It follows patterns — worse around scheduled news, opens, and thin pairs — which means it's predictable enough to measure and plan around.

Measuring Slippage Cost Yourself

You don't need special software to start measuring slippage cost — you need a log and some patience. Here's the workflow:

1. Record requested price and fill price for every order, either from your platform's trade history export or manually as you trade. 2. Calculate the difference in pips for each trade: fill price minus requested price, adjusted for direction (buy vs sell). 3. Tag each entry with context: instrument, time of day, whether it was near news, and order type (market, stop, limit). 4. Average the slippage over at least 50–100 trades to get a meaningful baseline rather than being misled by one or two outliers. 5. Split the average by context — news vs non-news, session open vs mid-session — to see where your slippage is actually concentrated.

Most trading platforms will show requested and executed price in the trade history or journal export, so this is mostly a spreadsheet exercise once you know where to look. Do this consistently for a month and you'll have a genuine, personal slippage baseline — far more useful than any generic industry figure.

Turning Pips Into Pounds

Once you have an average slippage figure in pips, convert it into money so it means something. The maths is simple:

Average slippage per trade (pips) × pip value × number of trades per month = monthly slippage cost.

For example, if your average negative slippage is 0.4 pips per trade, your pip value is £8, and you place 150 trades a month, that's £480 a month lost purely to execution — before you've even looked at spread or commission. Small per-trade numbers add up fast at higher trade frequency, which is exactly why scalpers and high-frequency strategies should treat slippage measurement as essential, not optional.

This is also where slippage interacts with your other trading costs. A broker with a slightly wider spread but consistently lower slippage might genuinely be cheaper all-in than one with a razor-thin spread and frequent bad fills. That's the kind of comparison PipTax's [cost tool](/audit.html) and [cost-impact breakdown](/cost-impact.html) are built for — they let you see spread, commission, swap, and slippage side by side rather than judging a broker on one headline number.

Reducing Slippage in Practice

You can't eliminate slippage, but you can reduce its impact with a few practical habits:

Avoid trading directly into scheduled news unless your strategy specifically requires it — this is where slippage spikes hardest.
Use limit orders for entries where your strategy allows it, since they won't fill worse than your specified price.
Trade during higher-liquidity sessions for your instrument — thin markets slip more.
Check execution model and account type — for example, comparing Pepperstone's Standard vs Razor account structures, or IG's own platform versus its MetaTrader offering, can reveal real differences in how orders are routed.
Review your broker's execution statistics, if published, alongside your own log rather than relying on marketing claims alone.

None of this is broker-specific advice to fabricate numbers around — it's a reminder that execution quality is measurable and comparable, and you should demand to see it rather than assume it.

Slippage Cost as Part of Your Total Trading Cost

Slippage cost only makes sense in context. A trader who checks spread and commission but ignores slippage is looking at half the picture. The full picture includes:

| Cost type | Where to check it | |---|---| | Spread | Broker's live pricing, /rates.html | | Commission | Account terms, /brokers/index.html | | Swap/rollover | /rates.html | | Slippage | Your own trade log (this guide) |

Bring all four together — using your own slippage log plus PipTax's [cost tool](/audit.html) — and you get a genuine all-in cost per trade, which is what actually determines whether a strategy is profitable after execution. For a deeper look at how we weigh these factors, see our [methodology](/methodology.html).

Trading carries risk, and no amount of measurement removes that — but understanding your true slippage cost means you're no longer trading blind on one of the biggest hidden costs in the business.

Key takeaways

Slippage cost is the gap between the price you requested and the price you actually got — it can run both for and against you.
Even small average slippage compounds fast: 0.3 pips per trade across 200 trades a month is a real, measurable drag on returns.
You can measure your own slippage by logging requested vs filled price on every order, then averaging the difference in pips.
Slippage tends to worsen around news releases, market opens, and on thin-liquidity pairs — timing your entries matters.
Order type, execution model (market vs instant), and broker infrastructure all influence how much slippage you see.
Use PipTax's cost tool alongside your own slippage log to see your true all-in trading cost, not just the quoted spread.

Want the real number for how you trade? Audit your MT4/MT5 statement free — see your true all-in cost and the genuinely cheapest broker for your style.

Frequently asked questions

Is slippage the same as a wide spread?: No. The spread is the gap between bid and ask at the moment you look at the price. Slippage is the difference between the price you clicked (or your stop/limit price) and the price your order actually filled at, once it reaches the market. You can have a tight spread and still get slipped, especially in fast markets.
Can slippage ever work in my favour?: Yes — this is called positive slippage, where you get a better price than requested (e.g. a buy fills lower than you asked). It happens less often than negative slippage in practice, particularly around news, but it's worth tracking both directions so your log reflects reality rather than just the bad days.
Do market orders slip more than limit orders?: Generally yes. A market order says 'fill me now at whatever price is available', so it's exposed to whatever the market is doing that instant. A limit order only fills at your price or better, so you avoid negative slippage on entry — but you risk not being filled at all if price moves away.
Does ECN or raw-spread account type reduce slippage?: It can, because these accounts typically route to deeper liquidity pools, but it's not automatic. Execution quality depends on the broker's infrastructure, your instrument, and market conditions at the time. Check a broker's execution stats and your own logs rather than assuming an account label guarantees better fills.
How much slippage is 'normal'?: There's no single number — it varies by pair, session, and volatility. The point of measuring is to build your own baseline so you can spot when something is off (for example, average slippage suddenly doubling) rather than comparing yourself to a generic industry figure.

Keep going: Audit Cost Impact Methodology Rates