Enumerates possible exchange states.
| Member | Value | Description |
|---|---|---|
| xsClosed | 4 | Order placement is not allowed; there are no quotes besides the end-of-day summary (Settlement, Open Interest, end-of-day total volume) that can follow; the DOM book is empty. |
| xsHalted | 1 | The trading is "halted" unexpectedly, order matching is not allowed, and order placement and cancellation depend on the particular exchange. |
| xsOpen | 3 | Order placement is allowed, bid/ask quotes can follow, matching and filling are functioning, trade messages are expected, and the DOM book cannot be crossed in the trading state. |
| xsPreOpening | 2 | Trading is not started, order placement is allowed, bid/ask quotes can follow, and the DOM book can be crossed because there is no matching in the out-of-trading state. |
| xsSuspended | 5 | "Suspended" is externally (regulation authorities) initiated interruption in trading that could last several days; this state should be considered as an extended "Halt" state - there are no bid/ask quotes, and the DOM book is in an unknown state due to order cancelation allowed. |
| xsUnknown | 0 | No info on Exchange State. |