| Name | Type | Description |
|---|---|---|
| contract | String | The option contract |
| underlying_symbol | String | The ticker symbol |
| timestamp | DateTime | The UTC timestamp at the time of the trade. |
| price | Float | The price of the trade. |
| size | Float | The size of the trade. |
| total_volume | Float | The total volume of the symbol for the day up to the timestamp point in time. |
| ask_price_at_execution | Float | The price of ask quote at the time of the trade. |
| bid_price_at_execution | Float | The price of bid quote at the time of the trade. |
| exchange | String | The exchange for the trade. |
| conditions | String | The condition of the trade. |
| sequence_id | Float | The sequential ID for the trade, ordered as temporally received from the exchange. |