How our data works.
Clear rules and verifiable sources: where every number comes from, what it means and what Fincast does when a source is silent.
Sources
Official rates come from the central banks that publish them; crypto prices from market data vendors. Every rate is shown with its source and date.
Data sources
Units and pairs
A rate shows how many units of the quote currency one unit of the base currency is worth. Sources that quote per 10 or 100 units are converted to one unit.
Example
1 EUR = 4.3661 PLN
How many PLN one EUR is worth by the official rate. Source: NBP.
Dates and days off
An official rate carries the date it applies to; a market price, the moment it was taken, in UTC. On days without a publication no new value appears.
Example
- Date of the rate · EUR/PLN
- October 16, 2026
- Time of a market price · ADA/EUR
- Oct 16, 2026, 12:23 PM UTC
Precision and display
Values are stored with the precision the source publishes. The site shows rates of one and above with four decimals; calculations use the stored value.
Example
- As stored
- 4.3661
- As shown
- 4.3661
Gaps and delays
If a source has not published, the last published rate stays, with its date. A rate more than four days old carries a warning. A missing value is never shown as zero.
A delay is shown, not hidden
The latest published rate is for October 16, 2026; nothing has been published since.
Forecasts
Forecasts are available to subscribers in the app. They are model estimates with stated uncertainty, not a promise of any result.
A forecast is not a guarantee
Forecasts are built from historical data and statistical models. They guarantee no outcome and are not investment advice.