How USD Euro 360 Collects, Checks and Publishes Market Data

Every number on this site comes from somewhere, and a reader deserves to know exactly where. This article documents the full pipeline behind USD Euro 360: which providers we call, how often, what each figure actually measures, and where the data is weakest.

The Guiding Rule: Public, Free, Auditable

We deliberately build on public endpoints that anyone can query. That choice has a cost — we accept delays and occasional gaps — but it buys something more valuable: every figure we publish can be independently checked by a reader with a browser. Nothing on this site depends on a private feed you cannot inspect.

Cryptocurrency Prices

Crypto spot prices come from CoinGecko's public market endpoints, with CoinPaprika used as a cross-check when a response looks implausible. Prices refresh roughly every 60 seconds on the market pages and continuously on the live ticker.

The number shown is a volume-weighted average across exchanges, not the price on any single venue. This is why the figure on our crypto page can differ by a few tenths of a percent from the price you see inside Binance or Coinbase. For the exchange-by-exchange view, the arbitrage scanner queries Binance, Coinbase, Kraken, KuCoin, Bybit and OKX directly and shows each venue's own last trade.

Market capitalisation is circulating supply multiplied by price. Circulating supply figures are provider estimates and are the single largest source of disagreement between crypto data sites. Treat market cap rankings as approximate, especially outside the top 50.

Foreign Exchange Rates

Currency rates come from open exchange-rate APIs whose ultimate reference is central bank publication, principally the European Central Bank's daily euro reference rates published each afternoon around 16:00 CET.

Two things follow from this that matter to every reader:

1. A reference rate is not a dealt rate. It is a mid-market snapshot. The rate your bank, broker or card issuer gives you includes a margin, typically 0.5% to 3% for consumer transfers. The reference rate tells you what the margin is, which is exactly why it is worth knowing.
2. Weekend and holiday rates are stale. Interbank FX effectively closes from Friday evening to Sunday evening. A Saturday rate is Friday's closing rate.

Stocks, ETFs and Commodity Futures

Equity and futures quotes come from Yahoo Finance's public quote endpoints, with Finnhub as a silent fallback when a symbol fails to resolve. Quotes are typically delayed 10 to 20 minutes for US equities and can be delayed more for European venues.

Commodity symbols ending in `=F` are front-month futures, not physical spot prices. The front-month crude oil contract is a wholesale reference for barrels deliverable next month; it is not the price of petrol at a pump in Ohio or a filling station in Bavaria. Grain, coffee and cocoa contracts work the same way: they set the raw-material cost that eventually flows into retail prices, with a lag of months.

Rankings: Billionaires, Athletes, Advertisers, Salaries

These pages are compiled rather than streamed. Net worth figures follow the methodology used by public wealth trackers: listed holdings are marked to live share prices, private holdings are valued on comparable-company multiples, and estimated debt and past giving are deducted. Private-company valuations are genuinely uncertain, so treat any single figure as a range, not a measurement.

Salary tables for the careers pages use the US Bureau of Labor Statistics Occupational Employment and Wage Statistics programme and, for Europe, Eurostat structure-of-earnings data. Both are annual surveys, which means a published median is already a year or more old by the time anyone reads it.

Advertising budgets are compiled from company filings and industry estimates published by Ad Age, WARC and COMvergence. Companies rarely disclose an exact global advertising line, so these figures are informed estimates.

What Can Go Wrong

• Provider rate limits. When a free endpoint throttles us, a table may show the previous cached value. Where we know a value is stale, the page says so.
• Symbol drift. Tickers change after mergers, delistings and exchange moves. A dash in a cell usually means the symbol no longer resolves.
• Thin markets. NFT floor prices and small-cap quotes can be set by a single trade. A dramatic percentage move in an illiquid market often means nothing at all.
• Rounding. We display prices to a sensible number of decimals, so a small discrepancy against an exchange screen is usually display rounding, not a data error.

How to Verify Anything Here

Open the underlying source. For a crypto price, check the coin's page on CoinGecko or the exchange itself. For a currency, check the ECB's daily reference rate table. For a stock, open the ticker on Yahoo Finance or your own broker. For a salary, search the BLS OEWS database by occupation code. If our number and the source disagree materially, the source wins — and we would like to know.

What This Site Is Not

USD Euro 360 is a publisher of market information. It is not a broker, an exchange, an adviser or a custodian. We never take custody of funds, we never execute a trade, and nothing published here is investment advice or a recommendation to buy or sell any asset. Markets carry risk of loss, including total loss, and past performance tells you nothing reliable about the future.