Scalpel
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1.Getting started
  • Install Scalpel on Windows
  • Install Scalpel on a Mac
  • Activate your Scalpel licence
  • Connect Scalpel to Interactive Brokers
  • Enable the API in TWS and IB Gateway
  • The IBKR market data you need for Level 2
  • Your first 15 minutes in SIM
  • A tour of the Scalpel cockpit
  • What Scalpel is for, and what it is not
2.Desks and layout
  • Load symbols onto desks
  • Add, remove and resize desks
  • Panel settings: Level 2, tape and chart
  • Set up Scalpel for one, two or three screens
  • Desk badges: DELAYED, NO DATA, STALE and HALTED
3.Reading the market
  • How to read Level 2 in Scalpel
  • Spot iceberg orders on Level 2
  • Read the time and sales tape
  • Hear the tape: tape sound
  • The chart: timeframes, VWAP, EMAs, MACD and delta
  • The read line and the chart read bar
  • Read the players on Level 2: venues, refills and size
4.Placing trades
  • Sizing presets: shares, dollars or risk
  • Trade a fixed dollar risk with Risk (Cents)
  • Hotkeys: the defaults and how to change them
  • Entries: marketable limits, offsets and partial fills
  • Scale out and flatten
  • The order bar and orders panel
5.Stops and targets
  • How Scalpel's stops work
  • Move your stop and target on the chart
  • Breakeven and trailing stops
  • R multiples: how Scalpel measures a trade
  • Stops in the pre-market: why they cannot sit on the book
6.SIM and LIVE
  • Paper trading with SIM
  • Switch to LIVE safely
  • Commissions: pick your IBKR plan
  • Analytics: review your trading
7.Risk controls
  • Set a daily loss limit (the kill-switch)
  • Fat-finger and max-position caps
  • Why Scalpel is long-only
8.Scanner
  • Set up the IBKR scanner
  • Scan types: momentum, running up and setups
  • Scan the pre-market
  • Shares out, short interest and the squeeze score
  • Arrange scan panels
9.Intel: borrow, dilution and catalysts
  • Turn on intel
  • Check a stock for dilution before you buy
  • Borrow, short fees and squeeze setups
  • Why is it moving? Catalyst grading
  • Every intel chip, explained
  • Warrant and offering lines on the chart
  • The dilution entry guard
10.Audio and alerts
  • Voice callouts and sounds
  • Alerts and toasts
11.Settings reference
  • Settings: Connection
  • Settings: Trading
  • Settings: Stops
  • Settings: Risk
  • Settings: Sizing
  • Settings: Appearance
  • Settings: Audio
  • Settings: Hotkeys
  • Settings: Intel
  • Settings: About
12.Licence, updates and account
  • Move your licence to a new computer
  • Updates: how Scalpel updates itself
  • Try new features early: the beta channel
  • Refunds, invoices and billing
  • Earn with the referral program
  • Get help on Discord
13.Troubleshooting
  • Scalpel says Disconnected: fix the IBKR connection
  • TWS is running but not accepting the connection
  • TWS signs out when IB Gateway starts
  • Delayed data, NO DATA or STALE, or Depth unavailable
  • A LIVE order was rejected
  • An order did not fill, or only part filled
  • Scan panels say the IBKR scanner is off or waiting
  • Licence: machine limit reached
  • Licence: Scalpel cannot reach scalpeltrade.com
  • Windows protected your PC: installing Scalpel
  • An update did not install, or Scalpel went back a version
  • The chart or app window is blank
  • The order bar is greyed out
  • No callouts or tape sound
  • Intel shows nothing or SEC filings are off
14.Tips and tricks
  • 40 Scalpel tips for faster, safer scalping
  • A pre-market routine with Scalpel
  • Trade without touching the mouse
  • Settings for a small account
  • Your first week: a SIM practice plan
  • The momentum method Scalpel is built around
15.Glossary
  • Day trading glossary
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Trading involves substantial risk of loss. Scalpel is software, not investment advice. LIVE mode places real orders in your Interactive Brokers account. No warranty. Simulated or replayed results do not guarantee future results. Scalpel is independent software and is not affiliated with, endorsed by or sponsored by Interactive Brokers LLC. IBKR and TWS are trademarks of their respective owners. Figures shown on this site are demo data, not live quotes. Scalpel is sold by QUITE RIGHT LIMITED, registered in England and Wales, company number 17053815. Copyright 2026.

    All guides
    1.Getting started
    • Install Scalpel on Windows
    • Install Scalpel on a Mac
    • Activate your Scalpel licence
    • Connect Scalpel to Interactive Brokers
    • Enable the API in TWS and IB Gateway
    • The IBKR market data you need for Level 2
    • Your first 15 minutes in SIM
    • A tour of the Scalpel cockpit
    • What Scalpel is for, and what it is not
    2.Desks and layout
    • Load symbols onto desks
    • Add, remove and resize desks
    • Panel settings: Level 2, tape and chart
    • Set up Scalpel for one, two or three screens
    • Desk badges: DELAYED, NO DATA, STALE and HALTED
    3.Reading the market
    • How to read Level 2 in Scalpel
    • Spot iceberg orders on Level 2
    • Read the time and sales tape
    • Hear the tape: tape sound
    • The chart: timeframes, VWAP, EMAs, MACD and delta
    • The read line and the chart read bar
    • Read the players on Level 2: venues, refills and size
    4.Placing trades
    • Sizing presets: shares, dollars or risk
    • Trade a fixed dollar risk with Risk (Cents)
    • Hotkeys: the defaults and how to change them
    • Entries: marketable limits, offsets and partial fills
    • Scale out and flatten
    • The order bar and orders panel
    5.Stops and targets
    • How Scalpel's stops work
    • Move your stop and target on the chart
    • Breakeven and trailing stops
    • R multiples: how Scalpel measures a trade
    • Stops in the pre-market: why they cannot sit on the book
    6.SIM and LIVE
    • Paper trading with SIM
    • Switch to LIVE safely
    • Commissions: pick your IBKR plan
    • Analytics: review your trading
    7.Risk controls
    • Set a daily loss limit (the kill-switch)
    • Fat-finger and max-position caps
    • Why Scalpel is long-only
    8.Scanner
    • Set up the IBKR scanner
    • Scan types: momentum, running up and setups
    • Scan the pre-market
    • Shares out, short interest and the squeeze score
    • Arrange scan panels
    9.Intel: borrow, dilution and catalysts
    • Turn on intel
    • Check a stock for dilution before you buy
    • Borrow, short fees and squeeze setups
    • Why is it moving? Catalyst grading
    • Every intel chip, explained
    • Warrant and offering lines on the chart
    • The dilution entry guard
    10.Audio and alerts
    • Voice callouts and sounds
    • Alerts and toasts
    11.Settings reference
    • Settings: Connection
    • Settings: Trading
    • Settings: Stops
    • Settings: Risk
    • Settings: Sizing
    • Settings: Appearance
    • Settings: Audio
    • Settings: Hotkeys
    • Settings: Intel
    • Settings: About
    12.Licence, updates and account
    • Move your licence to a new computer
    • Updates: how Scalpel updates itself
    • Try new features early: the beta channel
    • Refunds, invoices and billing
    • Earn with the referral program
    • Get help on Discord
    13.Troubleshooting
    • Scalpel says Disconnected: fix the IBKR connection
    • TWS is running but not accepting the connection
    • TWS signs out when IB Gateway starts
    • Delayed data, NO DATA or STALE, or Depth unavailable
    • A LIVE order was rejected
    • An order did not fill, or only part filled
    • Scan panels say the IBKR scanner is off or waiting
    • Licence: machine limit reached
    • Licence: Scalpel cannot reach scalpeltrade.com
    • Windows protected your PC: installing Scalpel
    • An update did not install, or Scalpel went back a version
    • The chart or app window is blank
    • The order bar is greyed out
    • No callouts or tape sound
    • Intel shows nothing or SEC filings are off
    14.Tips and tricks
    • 40 Scalpel tips for faster, safer scalping
    • A pre-market routine with Scalpel
    • Trade without touching the mouse
    • Settings for a small account
    • Your first week: a SIM practice plan
    • The momentum method Scalpel is built around
    15.Glossary
    • Day trading glossary
    Guides/7. Risk controls

    Guide 7.3

    Why Scalpel is long-only

    Beginner, 3 min read. Checked with Scalpel 1.12.8 on October 15, 2026.

    In short

    Scalpel only buys stocks and sells what it bought: it never opens a short position. Every sell, whether a scale-out, a full exit, a stop, a take-profit or a flatten, is capped to the shares you hold, so a double press or a stop firing during your own exit can never leave you short. This is a deliberate design choice: Scalpel is built for long-only scalping of US stocks, and it does not trade shorts, futures, options or crypto.

    Opinionated by design

    Scalpel is specialised software. It is built for one style of trading: buying momentum in US small-cap stocks, first of all in the pre-market (04:00 to 09:30 ET), and selling into strength. It works in regular hours too, but every part of it, from the Level 2 montage to the app-held stops, is shaped around that one job.

    So there are things it does not do, and almost certainly never will:

    • No shorting. You cannot sell what you do not own.
    • No futures, options or crypto. Stocks only.
    • No auto trader. You make every trade.

    Leaving those out keeps the cockpit simple and the safety rules strict. Every exit key means "sell some or all of what I hold", never "sell, whatever I hold".

    What long-only means for your exits

    • Sells are capped to your position. Half of 400 is 200; Ctrl+Z sells exactly what you hold, never more.
    • A sell with nothing to sell is refused. With no position, the order bar's sell buttons are grey, and a sell key shows No long position to sell.
    • Sells already working count. Interactive Brokers reports fills a moment after they happen, and a sell at the ask can rest for a while, so Scalpel counts the unfilled part of every sell you have working. If a new sell needs shares a working sell already offers, Scalpel never stacks the two: it cancels the working sell, waits for the cancel to be confirmed, and sends one order for what is still held, at the lower of the two prices. Press Ctrl+Z twice, or let a stop fire while your manual exit is still working, and you still sell exactly what you hold.
    • Stops and targets only close longs. When a stop or take-profit fires, it sells the shares you hold, replacing any sell already working on them.
    • Flatten sells to zero, not past it. In SIM, a flatten keeps selling the rest of a position on a thin book until you are flat, and stops there.
    BuyShares v$571100 sh$1.4k250 sh$2.9k500 sh$5.7k1000 sh
    Offset-10c+
    SellFull1/21/41/2 Ask1/2 MidB/ETrail
    Offset-10c+
    No long position to sell
    Flat: the Sell row is grey and a sell key is refused. Demo data.

    Why it matters

    Accidentally going short is one of the most dangerous mistakes a fast trader can make. A short position has no ceiling on its loss, and the stocks momentum traders trade, small caps on news, are exactly the ones that squeeze hardest. The usual cause is not a decision to short: it is a stacked exit, a double-tapped key, or a stop and a manual sell going out together. Scalpel makes that impossible by design.

    It does not make trading safe. Long positions in fast small caps can and do fall hard, and most people who trade this way lose money. Your protection on the long side is your size, your stop and your daily loss limit (guide 4.2, guide 5.1, guide 7.1).

    Questions

    Can I short stocks with Scalpel?
    No. Scalpel is long only. Every sell is capped to the shares you hold, so it can never open or add to a short.
    Does Scalpel trade futures, options or crypto?
    No. Scalpel trades US stocks only, and there are no plans to change that.
    What happens if I press sell twice?
    You never sell more than you own. If the first sell has filled, the second is refused with No long position to sell. If it is still working, the second replaces it with one sell for what you hold.
    Why is the sell row greyed out?
    You hold no position on that desk, or the market is closed. With no shares there is nothing to sell.

    Related guides

    Guide 4.5Scale out and flattenSell half, a quarter or the whole position at the bid, ask or mid, and flatten everything with Esc or Flatten All. What each exit does in SIM and in LIVE.Guide 7.2Fat-finger and max-position capsWhat Scalpel's fat-finger cap and max-position cap block, how they interact with risk sizing, and sensible values for small, medium and larger accounts.Guide 5.1How Scalpel's stops workWhy Scalpel holds your stops in the app, not on the book: pre-market rules, the working stop, catastrophe net and take-profit, and what if Scalpel closes.
    Previous: 7.2Fat-finger and max-position capsNext: 8.1 Set up the IBKR scanner
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