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Scalping and Broker Cost: Why the Table Matters More

Updated 14 July 2026 · 7 min read · PipTax education

Scalping and broker cost are two sides of the same coin: you can have the sharpest entry model in the world, but if the spread and commission table doesn't suit high-frequency trading, the maths will beat you before your setup gets a fair chance. This article explains why cost structure — not strategy — is usually the deciding factor for scalpers, and how to check yours properly.

Why Scalping and Broker Cost Are Inseparable

A scalper might take 10, 30, or even 100 trades a day, each targeting a handful of pips. On that timeframe, the spread and commission aren't a background detail — they're a direct percentage of your target.

Consider the arithmetic:

• Target: 5 pips. A 1.2 pip round-trip cost eats 24% of the move before you've even judged direction correctly.
• Target: 15 pips. The same 1.2 pip cost is under 8% — far more forgiving.

This is why scalping strategies that look profitable on a clean backtest often fall apart live: the backtest rarely models the real, variable cost of the account it's run on. A swing trader holding for 200 pips barely notices a 0.2 pip difference in spread. A scalper targeting 8 pips notices it every single trade, all day, every day.

The setup — your entry trigger, indicator, or price action pattern — decides *when* you trade. The cost table decides *whether the maths of that plan can ever work at all*. Get the cost side wrong and no amount of setup refinement will fix it.

Spread vs Commission: What Actually Hits a Scalper Hardest

Brokers price trading in two main ways, and scalpers need to understand both before choosing an account type:

| Model | How it works | Typical scalping impact | |---|---|---| | Spread-only | Cost is baked into the bid/ask gap | Simple to read, but spread can widen in volatile moments | | Raw spread + commission | Tighter raw spread, plus a fixed fee per lot | Often cheaper for high-frequency trading, but requires adding commission to the real cost |

Neither model is automatically "better" — it depends on your volume and trade size. A commission account might charge a flat fee per round turn that works out cheaper than a wider all-in spread once you're trading several lots a day, but only if you actually calculate it rather than assume it.

Both Pepperstone and IG offer more than one account type built around this exact trade-off, typically a standard spread-only option alongside a raw/commission-based one aimed at more active traders. Neither is right for everyone — the only way to know which suits your volume is to model both. That's exactly what our [cost tool](/audit.html) is built for: enter your typical trade size and frequency and see the real per-trade cost, not just the headline spread.

Why the Backtest Lies (If You Let It)

Most retail scalping backtests use one of two shortcuts, and both flatter the strategy:

1. Fixed spread assumption — using today's quoted spread for every historical trade, ignoring how it widens around news, rollover, or thin liquidity. 2. Zero or generic commission — treating commission as a rounding error rather than a real, recurring cost.

Both shortcuts hide the exact cost that determines whether a scalping strategy survives contact with a live account. A strategy showing a 60% win rate on 6-pip targets in backtest can turn negative once real variable spread and commission are added in in live conditions — not because the edge disappeared, but because it was never large enough to survive real cost.

Before trusting any scalping backtest:

• Rebuild it using variable, not fixed, spread data where possible
• Add commission per lot explicitly, not as an afterthought
• Test across a full week, not just calm London morning sessions
• Check the [cost impact page](/cost-impact.html) for how compounding costs affect returns over many trades

Building a Scalper's Cost Checklist

Before running any strategy live, work through this checklist against your actual broker account:

• Round-turn spread at the time of day you actually trade (not the marketed "from" figure)
• Commission per lot, converted into pips-equivalent for easy comparison
• Swap/rollover if any positions might cross midnight, even occasionally
• Slippage tendency during your typical entry windows — scalpers are especially exposed here
• Execution model — market maker, ECN, or hybrid — since this affects both spread behaviour and fill quality
• Minimum stop distance some brokers enforce, which can clash with tight scalping stops

Run these numbers through the [cost tool](/audit.html) with your real trade size and frequency, then compare against the [broker pages](/brokers/index.html) for account types built for active trading. Don't guess — measure.

Choosing an Account Type for High-Frequency Trading

Not every account is built for scalping, and some brokers restrict or discourage it in their terms. When comparing options:

• Check the execution type. ECN/raw accounts generally suit scalpers better than standard market-maker spreads, but confirm on the broker's own site.
• Confirm scalping is permitted. Most major FCA-regulated brokers, including Pepperstone and IG, allow it — but always check current terms rather than assume.
• Look at platform-level costs too. IG's own platform and MetaTrader via Pepperstone can have different cost structures for the same underlying market — compare both.
• Factor in VPS or latency if you're trading a fully automated scalping EA, since a slow connection adds slippage that no cost table shows directly.

None of this replaces reading the actual, current terms on the broker's own pages — this article teaches the workflow, not live pricing.

Turning This Into a Daily Habit

Scalping and broker cost should be checked together every time you adjust a strategy, not just once when you open an account. Costs change — spreads widen with volatility, brokers adjust commission tiers, swap rates shift with interest rates.

Build a simple routine:

1. Re-run the [cost tool](/audit.html) monthly, or after any broker account change 2. Recalculate your break-even pip target whenever spread or commission shifts 3. Revisit the [methodology](/methodology.html) behind how we calculate cost comparisons, so you understand exactly what's being measured 4. Cross-check current rates on the [rates page](/rates.html) rather than relying on memory

Conclusion: Respect the Table, Then Trust the Setup

Scalping and broker cost decide the ceiling on your edge long before your setup gets a say — a brilliant entry model built on a costly account structure is fighting a battle it can't win. Measure the table honestly, choose the account type that fits your real trading volume, and only then put your energy into refining entries. For a full breakdown of your own numbers, start with the [cost tool](/audit.html) and the [school](/school/index.html) for the fundamentals behind execution and pricing.

Keep going: Audit Cost Impact Index Methodology