OPEN-SOURCE SCRIPT
Index Futures Position Size Calculator V2
A simple, free position size calculator for CME index futures traders.
Click Entry, click Stop Loss, pick your asset, get your contract size instantly. Built for fast NY session execution — no spreadsheets, no manual maths, no noise.
This is the updated version. The first release was a bare-bones calculator showing contract size only with a fixed SL buffer. This version is a full rebuild — every feature below came from real trading feedback, not theory.
═══════════════════════════════════
✦ SUPPORTED INSTRUMENTS
MNQ · MES · NQ · ES — all CME tick values hardcoded. No manual lookup, no mistakes.
═══════════════════════════════════
✦ WHAT IS NEW IN THIS VERSION
→ SL buffer is now a toggle — switch the auto ±1 handle offset on or off anytime from settings. When on, the SL label shows +1H so you always know what was calculated
→ Panel now shows four live values — asset, contract size, real USD risk after rounding, and full stop distance in points
→ Direction arrow — ▲ Buy or ▼ Sell auto-detected from your Entry and SL position
→ Panel size control — choose Small, Medium, Large or XL to fit any screen or preference
→ Lines now start exactly at your click point and extend right — no more lines appearing from far left
→ Price labels on both lines — see your exact Entry and adjusted SL price at a glance
→ Ghost line bug fixed — no more phantom line appearing at the bottom when switching timeframes
→ Dark TradingView-native panel design — colour-coded values, clean two-column layout, easy to read at a glance during live sessions
═══════════════════════════════════
✦ FEATURES
→ One-click Entry and Stop Loss directly on the chart
→ Optional auto ±1 handle SL buffer — structural protection against wick hunts built in
→ Asset dropdown — MNQ, MES, NQ, ES with correct tick value loading automatically
→ Smart rounding — fractional contracts of 0.75 or higher round up, otherwise round down
→ Green Entry line and Red SL line from your exact click, both extending right
→ Live panel updates instantly when you move Entry or SL
═══════════════════════════════════
✦ HOW TO USE
Add to chart → click Entry → click Stop Loss → pick asset → set Account Size and Risk %. Read your size from the top-right panel. Three clicks and you are sized.
═══════════════════════════════════
✦ PROP FIRM CHALLENGE SIZING
Two clean methods to work within your max drawdown limit.
Method 1 — Loss budget split Divide your max loss by how many consecutive losses you can afford. Enter the result as Account Size with Risk at 100%. Example: $2,000 max loss ÷ 5 losses → Account Size $400 · Risk 100%
Method 2 — Direct percentage Enter your full max loss as Account Size and set your per-trade percentage. Example: $2,000 max loss, 20% per trade → Account Size $2,000 · Risk 20%
Both give the same result — use whichever feels natural.
═══════════════════════════════════
✦ A NOTE FROM THE AUTHOR
Built together with Claude AI through real iterative development — every single feature in this indicator exists because a real trade needed it.
This is 100% free and open source. No Discord, no course, no affiliate links, nothing to buy — ever.
You are completely free to copy this, modify it, rename it, improve it and republish it as your own. Seriously — go ahead. If you build something better on top of this, that is exactly the point. Clean tools should be free and open to everyone.
If it helps even one trader size their positions properly and protect their capital, it was worth sharing.
═══════════════════════════════════
✦ DISCLAIMER
Educational tool only. I do not take any responsibility when you use this indicator in your trading — always check the calculations before use. Futures trading carries substantial risk of loss. Not financial advice.
Built with ❤️ by REDz and Claude
Click Entry, click Stop Loss, pick your asset, get your contract size instantly. Built for fast NY session execution — no spreadsheets, no manual maths, no noise.
This is the updated version. The first release was a bare-bones calculator showing contract size only with a fixed SL buffer. This version is a full rebuild — every feature below came from real trading feedback, not theory.
═══════════════════════════════════
✦ SUPPORTED INSTRUMENTS
MNQ · MES · NQ · ES — all CME tick values hardcoded. No manual lookup, no mistakes.
═══════════════════════════════════
✦ WHAT IS NEW IN THIS VERSION
→ SL buffer is now a toggle — switch the auto ±1 handle offset on or off anytime from settings. When on, the SL label shows +1H so you always know what was calculated
→ Panel now shows four live values — asset, contract size, real USD risk after rounding, and full stop distance in points
→ Direction arrow — ▲ Buy or ▼ Sell auto-detected from your Entry and SL position
→ Panel size control — choose Small, Medium, Large or XL to fit any screen or preference
→ Lines now start exactly at your click point and extend right — no more lines appearing from far left
→ Price labels on both lines — see your exact Entry and adjusted SL price at a glance
→ Ghost line bug fixed — no more phantom line appearing at the bottom when switching timeframes
→ Dark TradingView-native panel design — colour-coded values, clean two-column layout, easy to read at a glance during live sessions
═══════════════════════════════════
✦ FEATURES
→ One-click Entry and Stop Loss directly on the chart
→ Optional auto ±1 handle SL buffer — structural protection against wick hunts built in
→ Asset dropdown — MNQ, MES, NQ, ES with correct tick value loading automatically
→ Smart rounding — fractional contracts of 0.75 or higher round up, otherwise round down
→ Green Entry line and Red SL line from your exact click, both extending right
→ Live panel updates instantly when you move Entry or SL
═══════════════════════════════════
✦ HOW TO USE
Add to chart → click Entry → click Stop Loss → pick asset → set Account Size and Risk %. Read your size from the top-right panel. Three clicks and you are sized.
═══════════════════════════════════
✦ PROP FIRM CHALLENGE SIZING
Two clean methods to work within your max drawdown limit.
Method 1 — Loss budget split Divide your max loss by how many consecutive losses you can afford. Enter the result as Account Size with Risk at 100%. Example: $2,000 max loss ÷ 5 losses → Account Size $400 · Risk 100%
Method 2 — Direct percentage Enter your full max loss as Account Size and set your per-trade percentage. Example: $2,000 max loss, 20% per trade → Account Size $2,000 · Risk 20%
Both give the same result — use whichever feels natural.
═══════════════════════════════════
✦ A NOTE FROM THE AUTHOR
Built together with Claude AI through real iterative development — every single feature in this indicator exists because a real trade needed it.
This is 100% free and open source. No Discord, no course, no affiliate links, nothing to buy — ever.
You are completely free to copy this, modify it, rename it, improve it and republish it as your own. Seriously — go ahead. If you build something better on top of this, that is exactly the point. Clean tools should be free and open to everyone.
If it helps even one trader size their positions properly and protect their capital, it was worth sharing.
═══════════════════════════════════
✦ DISCLAIMER
Educational tool only. I do not take any responsibility when you use this indicator in your trading — always check the calculations before use. Futures trading carries substantial risk of loss. Not financial advice.
Built with ❤️ by REDz and Claude
開源腳本
秉持TradingView一貫精神，這個腳本的創作者將其設為開源，以便交易者檢視並驗證其功能。向作者致敬！您可以免費使用此腳本，但請注意，重新發佈代碼需遵守我們的社群規範。
REDz
免責聲明
這些資訊和出版物並非旨在提供，也不構成TradingView提供或認可的任何形式的財務、投資、交易或其他類型的建議或推薦。請閱讀使用條款以了解更多資訊。
開源腳本
秉持TradingView一貫精神，這個腳本的創作者將其設為開源，以便交易者檢視並驗證其功能。向作者致敬！您可以免費使用此腳本，但請注意，重新發佈代碼需遵守我們的社群規範。
REDz
免責聲明
這些資訊和出版物並非旨在提供，也不構成TradingView提供或認可的任何形式的財務、投資、交易或其他類型的建議或推薦。請閱讀使用條款以了解更多資訊。