POSTbook_changes
https://xrpl-mainnet.nodit.io/Reports information about changes to the order books compared with the previous ledger version. It lets you check the traded volume and the open, high, low and close rates for each currency pair.
The hash of the ledger version to use. Pass a 32-byte hex string.
Specifies the ledger version to use. Pass a ledger index as an integer, or use one of the shortcut strings below.
validated: Uses the most recent ledger version validated by the network.closed: Uses the most recent ledger version the server has closed. It may not be validated.current: Uses the in-progress ledger version the server is currently building.
The ledger index of the version to use.
The first currency identifier. XRP uses XRP_drops; tokens use the issuer/currency format.
The second currency identifier. Only tokens are specified.
The total traded volume of the first currency.
The total traded volume of the second currency.
The highest exchange rate recorded in this ledger version.
The lowest exchange rate recorded in this ledger version.
The exchange rate before the ledger was processed.
The exchange rate after the ledger was processed.
The hash of the ledger version used.
The ledger index of the version used.
The official close time of the ledger, in seconds since the Ripple Epoch.
The response type. Always returns bookChanges.
Whether the response was derived from a validated ledger version.