Where the platform takes rates from?
Cryptocurrency rates are taken on CoinMarketCap since it is widely accepted as a de-facto standard for referencing current cryptocurrency price.
Fiat prices are taken from Apilayer.net.
How often rates updated?
Cryptocurrency rates are refreshed every 10 minutes.
Fiat rates are updated on daily bases.
Is there an alternative to CoinMarketCap rates?
Currently, CoinMarketCap is the only option available on the platform. Further platform verisons may include new features, such as selection of which rating source should be used as a source of the current price for an auction.