Chainlink Price Feeds offer decentralized, high-quality cryptocurrency price data, crucial for the operation and security of DeFi applications. While real-time price data is commonly used, accessing historical price data is also important for certain financial products that require analysis over time. Chainlink mitigates the security challenges of centralized data sources by providing a decentralized solution that aggregates data from premium providers. Developers can use Chainlink oracles to perform off-chain computations, enabling smart contracts to access historical price data without storing large amounts of data on-chain. This approach ensures data accuracy and verifiability, as it relies on existing Chainlink Price Feed contracts. By using off-chain computation, developers can efficiently determine the correct round ID for historical prices, which can then be verified on-chain, creating a trust-minimized method for obtaining historical price data without the inefficiencies of storing or iterating over large datasets on-chain.