Cancel Order
| Byte | Bit | Field | |
|---|---|---|---|
| 1 | 1 | ClearingFirm | O |
| 2 | MassCancelLockout | ||
| 4 | MassCancel | ||
| 8 | RiskRoot | O | |
| 16 | MassCancelID | O | |
| 32 | RoutingFirmID | O | |
| 64 | ManualOrderIndicator | ||
| 128 | OperatorId | ||
| 2 | 1 | MassCancelInst | O |
| 2 | Symbol | ||
| 4 | SymbolSfx | ||
| 8 | SendTime | R | |
| 16 | (Reserved) | ||
| 32 | (Reserved) | ||
| 64 | (Reserved) | ||
| 128 | (Reserved) |
ClearingFirm is required for service bureau ports. SendTime is required for all Cancel Order messages.