Specifies how long the order remains in effect. Absence of this field is interpreted as DAY.
| Code | Meaning |
|---|---|
| 0 | Day |
| 1 | Good Till Cancel (GTC) |
| 2 | At the Opening (OPG) |
| 3 | Immediate or Cancel (IOC) |
| 4 | Fill or Kill (FOK) |
| 5 | Good Till Crossing (GTX) |
| 6 | Good Till Date |