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Investing Math – Risk/Reward Calculator
x402
Investing Math – Risk/Reward Calculator is a paid API for AI agents from invest-math.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-29).
Calculates reward-to-risk ratio, break-even win rate, and expectancy for a trade given entry, stop-loss, and profit target prices.
Price / call$0.02
Success—
StatusUnknown
How this service works
Reward-to-risk ratio from entry, stop and target, the win rate needed to break even, and expectancy at your win rate.
Output
Returns the reward-to-risk ratio, risk per unit (entry minus stop), reward per unit (target minus entry), break-even win rate percentage, and — if a win rate is provided — the expectancy in R-multiples and per unit. Also includes a summary verdict, direction (long or short), and whether the setup has a positive edge.
Example use cases
Pre-trade risk evaluation for stock
“I'm thinking of buying a stock at $85, putting my stop at $81, and my target at $97 — what's the reward-to-risk ratio, what win rate do I need to break even, and if I win 50% of the time what's my expectancy?”
Options trade edge assessment
“Check if this options trade has a positive edge: I'm entering at $4.20, stop at $2.50, target at $9.00, and my historical win rate on similar setups is 40%.”
Crypto scalp setup review
“For a crypto scalp where I buy at $30,200, stop at $29,900, and target $30,800, calculate my risk-reward ratio and tell me the minimum win rate I'd need just to break even.”
Technical details
Endpoint
GEThttps://invest-math.x402tookit.com/risk-reward?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a fast, precise, single-trade risk/reward computation — especially when you want break-even win rate and expectancy together in one call. Prefer it over manual calculation or general-purpose LLM math when accuracy and structured output (R-multiples, per-unit values, edge verdict) matter. It complements position sizing endpoints but focuses purely on trade quality metrics.
Side effects
- Missing required parameters (entry, stop, target) returns a 400-level error
- Entry equal to stop (zero risk) causes division-by-zero or invalid ratio
- Nonsensical price combinations (e.g. stop above entry for a long) may produce negative or unexpected direction values
- winRatePct outside 0-100 range may produce unreliable expectancy values
- Network or payment authorization failure returns a 402 or 5xx error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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