> For the complete documentation index, see [llms.txt](https://sway-technologies.gitbook.io/sway-charts-api-documentation/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://sway-technologies.gitbook.io/sway-charts-api-documentation/rest-api-specification/cash-transaction/trading-session.md).

# Trading Session

| Field         | Value                                                   | Type                   |
| ------------- | ------------------------------------------------------- | ---------------------- |
| **weekDay**   | UTC week date the event occurs (e.g. Monday, 23:00:00Z) | Date+time **required** |
| **eventType** | Either `SESSION_OPEN` or `SESSION_CLOSE`                | String, **required**   |