Synthetix Subgraph is a powerful tool for querying and indexing data from Synthetix smart contracts.  The Synthetix Subgraph consists of a GraphQL API endpoint that queries on-chain data pertaining to price feeds, exchange rates, TVL (Total Value Locked), volumes per Synths (tokens that track the price of another digital asset), and many more. The extracted information can be used to analyze user behavior and develop new applications that interact with the Synthetix protocol.