Rules
Based on the official USD rate set by the Bank of Russia on October 22 for October 23 (cbr.ru). For October 21: ₽82.89.
The resolution source is the official data specified above. If the event has already happened but is not yet reflected in the source by the end date, the market may stay open until the end of the seventh day after the end date, until the data appears. If the data is still unavailable by then, another reliable source will be used.
Once the data is published, the market stays open for 24 hours to account for possible revisions. It then resolves based on the latest available data.