Max Drawdown

{
  "asOf": "2026-10-12T00:57:40.098Z",
  "currentDrawdownPct": -20,
  "degraded": false,
  "disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
  "educationalOnly": "Educational arithmetic on the numbers you supplied. Not investment advice: it does not say what to buy, sell, hold or how much to risk, and a supplied or past series does not predict the future.",
  "indexBase": "index 0 is the first price",
  "inputKind": "prices",
  "maxDrawdown": -0.25,
  "maxDrawdownPct": -25,
  "notChecked": [
    "intra-period moves: only the supplied points are seen, so the true drawdown can be deeper",
    "what caused the drawdown or whether it could recur",
    "…1 more"
  ],
  "observations": 6,
  "peak": {
    "date": "2024-02-29",
    "index": 1,
    "level": 120
  },
  "periodsPeakToTrough": 1,
  "periodsTroughToRecovery": 2,
  "reasons": [
    "Drawdown at each point = level / highest earlier level - 1; the maximum drawdown is the most negative one.",
    "Peak is the earlier high that the trough fell from; recovery is the first later point at or above that peak.",
    "…1 more"
  ],
  "recovery": {
    "date": "2024-05-31",
    "index": 4,
    "level": 130
  },
  "source": "computed locally",
  "summary": "Maximum drawdown -25% from 2024-02-29 to 2024-03-31; recovered at 2024-05-31.",
  "trough": {
    "date": "2024-03-31",
    "index": 2,
    "level": 90
  },
  "verdict": "DRAWDOWN_RECOVERED"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://portfolio-stats.x402tookit.com/max-drawdown?dates=2024-01-31%2C2024-02-29%2C2024-03-31%2C2024-04-30%2C2024-05-31%2C2024-06-30&prices=%5B100%2C120%2C90%2C110%2C130%2C104%5D'

# 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://portfolio-stats.x402tookit.com/max-drawdown?dates=2024-01-31%2C2024-02-29%2C2024-03-31%2C2024-04-30%2C2024-05-31%2C2024-06-30&prices=%5B100%2C120%2C90%2C110%2C130%2C104%5D' \
  | 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%2Fportfolio-stats.x402tookit.com%2Fmax-drawdown
const res = await pay("https://portfolio-stats.x402tookit.com/max-drawdown?dates=2024-01-31%2C2024-02-29%2C2024-03-31%2C2024-04-30%2C2024-05-31%2C2024-06-30&prices=%5B100%2C120%2C90%2C110%2C130%2C104%5D");
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://portfolio-stats.x402tookit.com/max-drawdown?dates=2024-01-31%2C2024-02-29%2C2024-03-31%2C2024-04-30%2C2024-05-31%2C2024-06-30&prices=%5B100%2C120%2C90%2C110%2C130%2C104%5D")
    print(res.status_code, res.text)