| Name | Type | Description |
|---|---|---|
| time | POSIXlt | The timestamp that the `last_price` represents. |
| last_price | Numeric | The price of the last trade. |
| ask_price | Numeric | The price of the top ask order. |
| ask_size | Numeric | The size of the top ask order. |
| bid_price | Numeric | The price of the top bid order. |
| bid_size | Numeric | The size of the top bid order. |
| volume | Numeric | The number of shares exchanged during the trading day on the exchange. |
| source | Character | The source of the data. |