To learn how you can add or remove columns from your Block Trades, read the Block Trades Properties page.
The following columns are already present or can be added to / removed from your Block Trades:
Contract - will contain the symbolic expression of a block traded contract, which can be a Future, Option, Strategy or Equity.
Last – the price at which the block trade occurred.
Last Size – the number of contracts that have been traded in the respective block trade.
Date – the date on which the block trade occurred.
Time – the exact timestamp for the block trade.
Contract Description - textual description of the contract.