You can query historical liquidation events from the protocol subgraphs. There's an example [here](https://github.com/aave/protocol-subgraphs#transaction-history) for an individual user or you query for all liquidation calls with: ``` { liquidationCalls{ id user{ id } collateralUserReserve{ reserve{ symbol reserveLiquidationThreshold } } collateralAmount principalReserve{ symbol reserveFactor } principalAmount liquidator timestamp } } ```