Scalping seeks small price moves over short holding periods, often seconds or minutes. Fast turnover makes execution and costs central to the result. A large number of trades can accumulate losses just as readily as gains.

Work Backwards From Net Results

There is no universal win rate required for scalping. It depends on the average win, average loss and costs. In an illustrative model with a $10 gross winner, a $10 gross loser and $2 round-trip costs per trade, a 60% win rate breaks even: 0.6 × 10 − 0.4 × 10 − 2 = 0. A different payoff or cost structure changes that threshold.

Use actual fill prices when measuring realised results. Do not deduct spread or slippage twice if their effect is already embedded in those fills. A strategy tested at candle prices without bid-ask and fill assumptions can overstate what is achievable.

Execution Matters More as Targets Shrink

A hotkey reduces the steps needed to submit an order; it does not guarantee acceptance or an instant fill. A limit order can miss a move or fill only partially. A market order can execute at a less favourable price than the quote you saw. Review order-type differences before testing rapid entries.

Depth and time-and-sales data show particular feeds and venues, not every participant's intentions. Displayed orders can be cancelled. Confirm which data you receive and whether it is delayed.

Practise quantity controls, order cancellation and recovery from lost connectivity before increasing trade frequency. A duplicate exit can create a new position after the original one has closed.

Capital and Account Rules Are Product-Specific

A broker's minimum deposit or intraday margin is an access threshold, not an adequate loss reserve. Check the instrument's minimum quantity, tick value, fees and liquidation policy.

For US securities margin accounts, do not rely on an old blanket $25,000 statement: FINRA's 2026 intraday-margin changes include a transition period. Ask your broker which framework and house requirements apply to your account.

A prop firm's advertised account may be simulated. Permission for scalping, trade-frequency limits and payout conditions depend on the specific programme; passing an evaluation does not itself establish access to live firm capital.

A Useful Beginner Test

Choose one instrument and a defined session. Record submission times, fills, spread, fees, missed orders and mistakes as well as price outcomes. Use simulation to learn the workflow, then assess its fill-model limitations separately. There is no requirement to progress to live scalping.

If the pace prevents you checking orders or following your loss limit, a slower decision process may be more manageable. Longer holding periods bring different risks, so they also need a specific plan and testing.

Risk Disclaimer: Trading involves substantial risk of loss. Past performance is not indicative of future results. See our full risk disclaimer.