====== LIST CANCEL REQUEST [35=K] ======

The List Cancel Request message cancels all components of batch orders (OCO, AutoOCO, Spark).

===== Prerequisites =====
  * Components must be working or suspended
  * ListID must be from FIX-submitted order
  * Account subscription required

===== Message Specification =====

**Message Direction:** Client → T4

^ Tag ^ Field Name ^ Type ^ Req'd ^ Description ^
| | **Message Header** | | Y | MsgType = K |
| 66 | ListID | String | Y | Batch order identifier |
| 60 | TransactTime | UTCTimestamp | Y | Cancel request time |
| 75 | TradeDate | LocalMktDate | O | Format: YYYYMMDD (default: today) |
| 58 | Text | String | O | Free text |
| 354 | EncodedTextLen | Int | O | Length of EncodedText |
| 355 | EncodedText | Data | O | Encoded text |
| 1028 | ManualOrderIndicator | Boolean | O | Y=Manual, N=Automated |
| | **Message Trailer** | | Y | |

===== Sample Message =====

**Cancel AutoOCO Request:**
<code>
8=FIX.4.2|9=150|35=K|49=T4Example|56=test|50=Account1|52=20130426-16:43:37.552|
66=fnl-635025734129974450|60=20130426-16:43:37.552|10=123|
</code>

**Cancel Responses (one per component):**
<code>
8=FIX.4.2|9=400|35=8|49=T4|56=T4Example|50=T4FIX|52=20130426-16:43:37.568|
143=US,IL|1=Account1|11=auto-2-635025734129974450|66=fnl-635025734129974450|
17=0..018.2.F4B7C503|150=4|37=F4B7C503-A5F1-4943-971B-00E9867622C1|39=4|
48=CME_20130600_ESM3|55=ES|207=CME_Eq|200=201306|59=0|
107=E-mini S&P 500 Jun13|54=2|167=FUT|38=0|40=2|44=-50|21=1|204=0|
1385=2|10101=157800|10=234|
</code>

===== Notes =====
  * Each component receives individual cancel Execution Report
  * Non-FIX batch orders: use Order Cancel Request on working component
  * Malformed messages rejected with Session Reject (35=3)
  * Application errors return Cancel Reject (35=9)