Risk Reward

{
  "asOf": "2026-10-11T20:30:30.782Z",
  "breakEvenWinRatePct": 25,
  "degraded": false,
  "direction": "long",
  "disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
  "expectancyPerUnit": 3,
  "expectancyR": 0.6,
  "notChecked": [
    "whether the win rate you assume is realistic for this setup",
    "fees, slippage and partial fills, which lower real expectancy",
    "…1 more"
  ],
  "positiveEdge": true,
  "reasons": [
    "Break-even win rate = 1 / (1 + R). Expectancy (in R) = win rate x R - loss rate x 1.",
    "A good ratio does not make a trade good: the win rate has to hold up too."
  ],
  "rewardPerUnit": 15,
  "rewardToRisk": 3,
  "riskPerUnit": 5,
  "source": "computed locally",
  "summary": "Risk 5 to make 15: 3R reward-to-risk; you must win 25% of trades to break even. At a 40% win rate the expectancy is 0.6R per trade (positive).",
  "verdict": "FAVOURABLE_RATIO",
  "winRatePct": 40
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://invest-math.x402tookit.com/risk-reward?entry=100&stop=95&target=115&winRatePct=40'

# x402 v2 sends the challenge base64-encoded in the PAYMENT-REQUIRED header (v1 sends it in the body).
# To read the header:
curl -sS -g -o /dev/null -D - 'https://invest-math.x402tookit.com/risk-reward?entry=100&stop=95&target=115&winRatePct=40' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode

// npm i @x402/fetch @x402/evm viem
import { wrapFetchWithPayment, x402Client } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

// Pays at most $0.02 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.02" });
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.EVM_PRIVATE_KEY) });
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? ToolVet checks it first for $0.005. Pay for that from a separate
// client: this one is capped at $0.02 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Finvest-math.x402tookit.com%2Frisk-reward
const res = await pay("https://invest-math.x402tookit.com/risk-reward?entry=100&stop=95&target=115&winRatePct=40");
console.log(res.status, await res.text());

# pip install "x402[requests,evm]"
import os
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client

# Pays at most $0.02 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.02"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://invest-math.x402tookit.com/risk-reward?entry=100&stop=95&target=115&winRatePct=40")
    print(res.status_code, res.text)