I’m fairly certain Splinterlands retrieves those prices from its API (the fact that the DEC price is identical on both the website and the API suggests as much), but I honestly don’t understand how accurate it is in real‐world market conditions. For example, at the time of writing, the SPS “market” price returned by the API is $0.0129602, whereas the SPS price in the SWAP.HIVE/SPS pool is $0.0130879 (+0.986%), and the best bid in the SPS market is $0.0130223 (+0.479%). However, the implied SPS price is probably calculated using the HIVE price provided by the API as well, which is much closer than the HIVE price on centralized exchanges (~0.008% difference versus 0.479–0.986%). But what is the second component of the SPS price calculation? I can’t really tell. I have the same questions about the API pricing for BTC and SWAP.BTC (where the discrepancy exceeds 1.5%).