Every number here has an exact definition.
Less prediction, more understanding starts with being precise about what a number actually measures. This page documents the real definitions behind Traderista’s data — not marketing copy.
Our data-sourcing claim, in one paragraph
Calendar data is aggregated from official public economic-calendar sources, with a full ten-year release history retained. Every statistic is computed from as-reported values, the figures markets actually traded on, which are immutable once recorded. Price reactions are measured over a fixed, published measurement window. USD Index computed by Traderista from constituent pairs.
How is a market reaction measured?
A market reaction is the percentage price change across an exact 60-minute window, built from 15-minute candles — never a 1-hour candle, and never a window that starts before the release.
Most US releases land at :30 past the hour, so a naive “1-hour candle containing the release” window would actually start 30 minutes before the release, mixing pre-release drift into the measurement. Traderista instead uses: the opening price of the 15-minute candle that contains the release (T0), and the closing price of the 15-minute candle starting 45 minutes after the release (T1) — exactly 60 minutes apart. The move itself is (T1 − T0) / T0.
This 60-minute window applies to every FX pair, gold, and silver. The 8 stock indices Traderista tracks currently use a daily open-to-close window instead (or the next session’s opening gap, if the release lands while that market is closed) — a coarser measurement, disclosed here rather than left implicit.
How is the USD Index calculated?
The USD Index is a number Traderista computes itself from six real currency pairs — it is not purchased or licensed from ICE, and no absolute index level is ever shown, only the percentage change.
The formula (public, the same weighting ICE’s own U.S. Dollar Index uses) combines EUR/USD, USD/JPY, GBP/USD, USD/CAD, USD/SEK, and USD/CHF, each raised to its own fixed weight and multiplied together with a constant. The euro carries the heaviest weight, the Swiss franc the lightest.
The USD Index figure is computed by Traderista from constituent pairs — not the ICE U.S. Dollar Index®. Traderista is not affiliated with, and this figure is not endorsed by, the owners of any licensed index it may be compared to.
What happens when a data point gets revised?
Once an economic release’s actual value is recorded, it never changes. Forecast and previous-period figures can still update as new information arrives before the release, but the actual reading is locked the moment it is first set — Traderista never silently overwrites a number that’s already been measured against.
Every revision that follows is still captured. The ingestion archive is append-only, so each restatement of a figure is stored as its own record rather than replacing the original. Nothing is lost; the as-reported value simply stays the one every statistic is measured against.
One deliberate limitation, stated plainly: Traderista does not currently run an automated second-source check against an independent statistical authority. Recorded values come from the calendar ingestion path described above and nothing on this site claims otherwise. That independent verification layer is built and scheduled, not live. When it runs, it will be described here and a per-release verification mark will appear on the affected figures. Until then, no such mark is shown anywhere on the site.
Where does historical price data come from?
Currency pairs and gold are measured from one market-data feed; silver and the 8 tracked stock indices from another. Each asset has exactly one source, used for both its historical archive and its ongoing measurements, so a statistic can never be assembled from two feeds that disagree.
The silver and index feed is available under a non-commercial licence, which shapes exactly how Traderista is allowed to use it. Traderista stores only its own derived reaction statistics computed from that data and never redistributes the raw price candles themselves. A written exit plan is on file should those terms ever change: move that leg onto a licensed market-data feed, on the same one-source-per-asset rule.
Traderista provides educational information and historical data only. Nothing here is financial advice. Trading involves substantial risk of loss. Past performance does not indicate future results.