Can Scalping Be Profitable After You Pay Spreads, Commissions and Slippage?
Direct answer
Scalping after costs
It can be, but only if your average gain per trade is large compared with what each trade costs. Costs are paid on every trade, so the smaller your target, the bigger the share costs take. With a 5-pip target, a 5-pip stop and 1.7 pips of round-trip cost (spread plus commission), you need to win about 67% of trades just to break even. With 20-pip targets and the same cost, break-even falls to about 54%. Before you scalp, work out your all-in cost per trade in ticks or pips and the win rate you need after costs. Test it on live fills, not on a backtest that assumes zero costs.
- Break-even win rate = (stop + cost) ÷ (target + stop)
- 5-pip target and stop, 1.7-pip cost: 67% needed (vs 50% at zero cost)
- 20-pip target and stop, same cost: about 54%
- CME tick values: ES $12.50, MES $1.25, NQ $5, MNQ $0.50
- Prop firms like Topstep ban scalping bots that exploit simulated fills
Scalping looks easy on a chart: dozens of small wins a day. The catch is that every one of those trades pays a spread and usually a commission, win or lose. The smaller the target, the larger the share of it that goes to costs.
What people on X are asking
In August 2026 one trader put it bluntly: a scalping strategy that makes 5 pips per trade "looks incredible on paper until you factor in spread expansion and commission costs". In April 2026 another worked through "20 trades a day, $50 each, that's $1,000/day right?" before listing why "Fees eat your edge". A reply to a backtest in January 2026 said that on the 5-minute chart "the spread + commissions + slippage IS the strategy killer". In crypto, one trader said he was never able to make money scalping "mainly due to the fees and spread". And a July 2026 post reminded readers that "Whether you win or lose, your broker still takes its commission".
What people in the thread said
- The author of the original backtest, @ChartMuse, replied in the same thread that the system "does not hold up after costs" on the short timeframe, and only looked solid on 4-hour and daily charts once costs were included. That is the pattern the tables below predict: longer holding periods mean bigger targets, so the fixed cost per trade matters less.
- @incGains asked about the stop and target settings and pointed out that connecting to a live exchange "changes everything". Fair: live fills include slippage and queue position, which a bar-based backtest does not model.
These are community comments, summarised in our words; the data and sources below come first.
The fact-checked answer
The arithmetic. If your target is T, your stop is S and your all-in round-trip cost is C (all in pips or ticks), a winner nets T − C and a loser costs S + C. The win rate p that breaks even solves p × (T − C) = (1 − p) × (S + C), which gives:
Break-even win rate = (S + C) ÷ (T + S)
At zero cost and equal target and stop this is 50%. Costs push it up, and they push it up much more when T and S are small.
Real contract sizes. CME's Micro E-mini FAQ lists a minimum move of 0.25 index points worth $1.25 for Micro E-mini S&P 500 (MES) and $0.50 for Micro E-mini Nasdaq-100 (MNQ). The multipliers are $5 and $2 per point, one tenth of the E-minis at $50 (ES) and $20 (NQ). So an ES tick is $12.50 and an NQ tick is $5. On a standard forex lot of 100,000 units of a pair quoted in US dollars, such as EUR/USD, one pip (0.0001) is $10.
Break-even win rate for equal target and stop, by cost per trade
Our calculation with the formula above. The costs are assumptions for illustration: 1.7 pips = a 1-pip spread plus $7 round-trip commission per standard lot; 1 MES tick = $1.25 of fees and slippage per round trip; 0.2% = 0.1% taker fee on each side. Use your own broker's numbers. Tap a column header to sort.
| Forex, 5 pips | 0 | 0% | 50.0% |
| Forex, 5 pips | 1.7 pips | 34% | 67.0% |
| Forex, 10 pips | 1.7 pips | 17% | 58.5% |
| Forex, 20 pips | 1.7 pips | 8.5% | 54.3% |
| MES, 4 ticks | 1 tick | 25% | 62.5% |
| MES, 16 ticks | 1 tick | 6.3% | 53.1% |
| Crypto, 0.3% | 0.2% | 67% | 83.3% |
| Crypto, 1.5% | 0.2% | 13% | 56.7% |
What the table shows. The same 1.7 pips of cost takes 34% of a 5-pip target but only 8.5% of a 20-pip one. A scalper needs a much higher hit rate than a swing trader paying the same cost, and win rates that high are hard to keep up.
Spreads are not fixed. Spreads usually widen around news releases and when liquidity is thin, which is when many short-term setups trigger. Test with the widest spreads you actually see, not the quiet-hours ones.
Slippage counts too. A market order or stop fills at the next available price, not the price on the screen. One tick of slippage on each side of an MES trade adds $2.50 per round trip. On a 4-tick target ($5.00), that is half the gross profit.
Prop firm rules. Scalping is allowed at most futures prop firms, but some forms are not. Topstep's prohibited strategies page lists "Running scalping algorithms designed to exploit unrealistic SIM fills" and "Making hundreds of rapid trades to take advantage of preferential queue position in SIM" as banned. Simulated fills can be better than live ones.
When scalping can work. It needs low all-in costs, a measured edge that survives them, and the discipline to stop when conditions change.
Free PDF
Scalping cost worksheet (PDF)
Price your own setup before you trade it.
Your costs per round trip
Your setup
Checks
- Is your live win rate at least 5 points above break-even?
- Did you test with costs at news times, not just averages?
- What happens to break-even if the spread doubles?
- Do your broker or prop firm rules restrict the strategy?
Fill-in fields in the PDF: Typical spread (pips or ticks); Commission per round trip, converted to pips or ticks; Average slippage per round trip; All-in cost C; Average target T; Average stop S; Break-even win rate = (S + C) ÷ (T + S); Your live win rate over at least 100 trades.
Download the PDF (44 KB, made by UXS, no sign-up)
Costs take a bigger share of small bars; see what chart timeframe a beginner should use.
Decision helper
| If… | Then… |
|---|---|
| Cost is over 25% of your target | Widen targets or cut costs before trading it |
| Backtest assumed zero costs | Re-run it with spread, commission and one tick of slippage |
| Live win rate is near break-even | Stop; noise can easily erase a thin edge |
Related reading: what a good risk-reward ratio is, win rate vs expectancy, how to stop overtrading and what a point is worth on NQ and MNQ.
Common mistakes
- Backtesting with zero or fixed average costs.
- Ignoring spread widening around news.
- Trading so often that commissions outgrow the edge.
- Using simulated fills as proof a strategy works live.
FAQ
Is scalping profitable?
It can be for traders with a real edge and low costs. Calculate the break-even win rate including all costs; if your live results don't clear it with a margin, it isn't.
How do I calculate my break-even win rate?
Add your stop and your round-trip cost, then divide by target plus stop. With a 5-pip target and stop and 1.7 pips of cost: 6.7 ÷ 10 = 67%.
How much is a tick on ES and MES?
CME lists 0.25 index points as the minimum move. That is $12.50 on ES ($50 per point) and $1.25 on MES ($5 per point).
Why do spreads matter more for scalpers?
Because you pay the spread on every trade and your target is small. The same spread is a much larger share of a 5-pip gain than of a 50-pip one.
Do prop firms allow scalping?
Many do, but Topstep, for example, bans scalping bots that exploit unrealistic simulated fills. Read your firm's rules.
Is a longer timeframe always better?
Not always, but larger targets reduce the share taken by costs. Your edge still has to exist on that timeframe.
Sources
- CME Group: FAQ, Micro E-mini equity index futures
- CME Group: E-mini S&P 500 contract specs
- CME Group: E-mini Nasdaq-100 contract specs
- Topstep: Prohibited trading strategies
Facts checked November 10, 2026. X posts are cited as evidence of the question, not of the answer.