Build a Position Size Calculator with AI
Vibe-code a risk-first position-size calculator — account, risk %, and stop distance to exact size.
How it works
Step 1
Describe your idea
Write a plain-text prompt describing what you want.
Step 2
AI builds it
Cryptohopper generates production-ready code instantly.
Step 3
Deploy & go live
Your project is hosted on its own subdomain in minutes.
Why build with AI instead of hiring a developer?
| Cryptohopper | Traditional developer | |
|---|---|---|
| Time to launch | Under 5 minutes | 2-8 weeks |
| Cost | From $0 | $5,000 - $50,000+ |
| Maintenance | Included | Ongoing retainer |
What is a position size calculator?
Position sizing is the most important number most traders never calculate. It decouples 'how confident am I' from 'how much can I lose', and it's the difference between a drawdown you recover from and one you don't. The risk-first method is simple: pick the fraction of your account you're willing to lose on a trade (say 1%), set where you'll be wrong (the stop), and the position size falls out of the math. Do that on every trade and no single loss — or even a losing streak — can wreck you. A good calculator makes this instant and adds the things leverage traders need: required margin, distance to liquidation, and the reward:risk of a planned take-profit. Cryptohopper.AI generates that exact tool, running entirely in your browser, from one sentence.
Common features
- Account balance, risk %, entry, and stop → exact position size
- Reward:risk and R-multiples for a chosen take-profit
- Leverage support: required margin and liquidation distance
- Long and short, any pair
- Runs fully client-side — nothing is transmitted
- Clean, fast inputs with instant results
Real-world examples
Fixed-fractional risk
Risk exactly 1% of the account per trade; the calculator returns the units to buy given your entry and stop.
Leverage check
See the margin a leveraged position needs and how far your stop sits from liquidation before you place it.
Reward:risk planner
Enter a take-profit and instantly see whether the trade clears your minimum R-multiple.
Why Cryptohopper.AI fits position size calculator projects
It's a calculator you'll actually use — yours, ad-free, on your own subdomain, with every number computed locally. Cryptohopper.AI builds it from a sentence and you can tweak the defaults, add your usual pairs, or fold it into a trading-journal in the same chat.
Try these prompts
Copy any prompt below and paste it into Cryptohopper to get started.
Build me a position-size calculator that takes my account balance, risk percentage, entry, and stop price and outputs the exact position size and reward:risk.
Create a calculator with leverage support that shows required margin and liquidation distance alongside position size.
Make a risk calculator that also shows R-multiples for a chosen take-profit.
Build a clean position sizer with a slider for risk % and instant results.
Frequently asked questions
Why size positions by risk?
Does it handle leverage?
Is it accurate?
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