Scalping
Scalping is a very short-term style that aims to take many small profits from tiny price moves, often holding for seconds or minutes.
Scalpers trade the smallest moves in the market: a few cents in a stock, a few pips in a currency, a few ticks in a future.1 Positions last seconds or minutes, and a busy scalper may trade dozens of times a day. With moves that small, the spread, fees and execution quality decide almost everything. This entry explains how scalping works, why costs dominate, and what it takes for the arithmetic to work.
- Category
- Trading Strategies
- Reading time
- 5 min
- Also called
- Scalper, Scalp, Scalp trading
- Updated
Scalping in plain words
A scalper tries to catch a tiny move — say 10 cents on a $50 stock — get out, and repeat.2 Each trade makes or loses little; the result comes from doing it many times with a small edge.
Because the target is tiny, paying the spread on every trade is a large cost. A 2-cent spread is 20% of a 10-cent target. See Bid-Ask Spread.
How scalping works, step by step
Choose very liquid markets
Tight spreads and deep order books are essential. See Liquidity.
Use very short timeframes
Tick, 1-minute and order-book views; many scalpers watch the tape. See Time and Sales.
Define tiny targets and stops
For example +10 cents / −8 cents, set before entry.
Minimise costs
Low commissions, maker rebates where available, and limit orders where possible. See Maker and Taker Fees.
Execute fast and consistently
Reliable platforms and quick exits matter; hesitation turns small losses into big ones.
Track net results
Measure profit after all costs, per trade and per day. See Expectancy.
Worked examples
Example 1 — The cost wall
CostsA scalper targets +$0.10 and stops at −$0.08 on 1,000 shares. The spread is $0.02, and commissions are $0.005 a share each way.
| Costs per round trip | 1,000 × ($0.02 + $0.01) = $30 |
| Gross win / loss | +$100 / −$80 |
| Net win / loss | +$70 / −$110 |
After costs, winners are smaller and losers bigger. The break-even win rate jumps from about 44% to about 61%.
Example 2 — Does the edge survive?
Thin edgeOver 400 trades the scalper wins 62%. Net average win +$70, net average loss −$110.
| Expectancy | 0.62 × $70 − 0.38 × $110 = +$1.60 a trade |
| Over 400 trades | +$640 |
Profitable — barely. A small increase in costs or slippage would erase it, which is why scalpers obsess over execution.
Example 3 — Using limit orders
ExecutionThe same scalper enters with limit orders at the bid instead of buying at the ask, saving the $0.02 spread on entry when filled.
| Saving per filled trade | 1,000 × $0.02 = $20 |
| Trade-off | Some entries are missed when price moves away |
Passive entries cut costs but miss some trades. See Limit Order and Queue Position.
The spread a scalper crosses
Try it: what does the spread cost a scalper?
Enter a bid, an ask, your size and how many round trips you make a month. Scalpers often make hundreds. It runs in your browser.
| Spread | $0.04 (0.08% of the mid price) |
| Cost per round trip (buy at ask, sell at bid) | −$20.00 |
| Cost per month | −$400.00 |
| Cost per year | −$4,800.00 |
Assumes the spread stays the same and you trade at the quoted prices; commissions and slippage come on top.
Scalping vs. day trading
| Aspect | Scalping | Day trading |
|---|---|---|
| Holding time | Seconds to minutes | Minutes to hours |
| Target per trade | Ticks, cents, pips | Larger intraday moves |
| Trades per day | Many (often dozens) | A few to a dozen |
| Cost sensitivity | Extreme | High |
| Key skill | Execution | Setup selection |
Where scalping is used
Highly liquid futures and forex
Index futures and major currency pairs offer tight spreads and deep books.
Liquid large-cap stocks
Penny-wide spreads make small targets possible.
Crypto with maker rebates
Some exchanges pay makers, which changes the cost arithmetic. See Maker and Taker Fees.
Market making and high-frequency trading
Professional firms do a version of scalping at scale. See High-Frequency Trading.
Advantages and disadvantages
Advantages
- Very short exposure to market risk per trade.
- Many trades produce statistics quickly.
- No overnight positions.
Disadvantages
- Costs consume a large share of every trade.
- Requires intense focus and fast, reliable execution.
- Small slippage changes the result dramatically.
- Competes with professional and automated traders.
Going deeper
Read as far as you need. Each level builds on the one before it.
Calculate costs before anything else
Beginner
Write down spread, commission and typical slippage as a share of your target. If they are more than about a third of it, the setup is unlikely to work.
Break-even win rate after costs
Intermediate
With net win W and net loss L per trade, the break-even win rate is L ÷ (W + L). In Example 1 that is $110 ÷ $180 ≈ 61%, compared with $80 ÷ $180 ≈ 44% before costs. See Win Rate.
Queue position and adverse selection
Advanced
Passive limit orders only fill when someone trades against them — often just before price moves further in that direction. Scalpers who rely on limit orders must account for this adverse selection, not just the saved spread. See Queue Position.
Common mistakes
Ignoring costs
A strategy that is profitable before costs is often a loser after them.
Scalping illiquid markets
Wide spreads make small targets impossible.
Letting a scalp become a swing trade
Holding a losing scalp “until it comes back” breaks the method’s maths.
Trading tired
Scalping demands concentration; mistakes rise quickly with fatigue. See Decision Fatigue and Analysis Paralysis.
Check your understanding
Test yourself before moving on. Each answer comes with an explanation.
Key points to remember
- Scalping targets tiny moves, holding for seconds to minutes.
- Costs — spread, commission, slippage — dominate results.
- Only very liquid markets with tight spreads are suitable.
- Calculate the break-even win rate after costs before trading.
- Execution speed and discipline matter more than chart analysis.
Frequently asked questions
Is scalping profitable?
What is the best market for scalping?
Do brokers allow scalping?
Further learning
- Bid-Ask Spread
The cost that matters most to scalpers.
- Day Trading
The slightly slower alternative.
- Limit Order
How passive orders reduce costs.
- Expectancy
Checking whether a thin edge survives costs.
Sources
This article is written in our own words. The sources below support the specific facts, rules and figures marked with a number in the text. Links open the original publisher’s page.
- IG. Forex scalping strategy: a beginner’s guide (opens in a new tab) Checked .
- Investor.gov (SEC). Day Trading (glossary) (opens in a new tab) Checked .
Read more elsewhere
- Investopedia: Scalping (opens in a new tab)
Educational content, not financial advice. Examples use hypothetical prices and simplified costs; actual fees, margin rules and regulations vary by broker, market and country. We are not affiliated with any publisher linked above. Last reviewed . Report an error or request a source credit.