Read the denominator first
The overseas monitor shows a composite reference made from Binance and trade[XYZ] best-bid and best-offer midpoints. Its 24-hour comparison uses a different denominator: the XYZ oracle observed near 24 hours earlier. The formula is 100 × (current composite / historical XYZ oracle − 1). It measures a reference difference across two series, not the return of a portfolio, an exchange-listed share, or the composite itself.
For a hypothetical example, a current composite of USD 102 and a historical oracle of USD 100 produce +2%. That calculation does not tell us that the composite was USD 100 yesterday. If yesterday’s composite had instead been USD 101, the composite-to-composite change would have been about +0.99%. These numbers illustrate the formula; they are not observed prices or investment performance.
The opening comparison has its own clock
The opening comparison uses the first valid XYZ oracle observation within two minutes after the scheduled regular-session opening. It is not the exchange’s official opening auction price. Before the next session and during holidays, the monitor retains the latest trading session’s opening baseline. Without an accepted baseline, the percentage remains unavailable.
The instrument’s session matters more than the country tab. EWJ is a U.S.-listed Japan equity ETF, so its opening comparison follows the U.S. session. It must not be interpreted as the Tokyo opening price of a Japanese stock. The country tab describes market exposure; it does not move the listing to another exchange.
A historical comparison is not a reconstructed composite
Accepted on-chain XYZ oracle observations can restore a comparison baseline from before the service started collecting locally. That history belongs to the oracle series. It does not establish that the service calculated the same composite, with the same inputs and weights, at that earlier time. A historical oracle point and an observed composite sample must remain distinguishable.
When comparing a screenshot with the live monitor, check the selected instrument, quotation currency, calculation time and comparison label. A screenshot preserves a point in time; an indexable stock URL identifies the instrument. Changes in display mode do not create a new financial instrument or a new search document.