OneChronos European Onboarding Document Library
This page provides access to downloadable onboarding resources for the trading venues operated by OneChronos Markets UK (MIC code OCXL) and OneChronos Markets NL (MIC code OCXE), collectively known as "OneChronos Europe MTF". The documents listed are current when posted and will be replaced with version control when updated. OneChronos Markets UK Limited (Company number 15456957, FRN 1022069 - authorised by the FCA in the United Kingdom) is a wholly owned subsidiary of OCX Group Inc and OneChronos Markets NL B.V. (Chamber of Commerce number 93411073 - seeking regulatory authorisation in the Netherlands) is a wholly owned subsidiary of OneChronos Markets UK Limited.
If you have any questions or need assistance, please contact us at [email protected]
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Onboarding Documents
- OneChronos UK & EU MTF Subscriber Onboarding Questionnaire
- Short-to-Long Code Mapping - Upload Specification
- OneChronos FIX Specification v1.13
- OneChronos EU MTF Rulebook - 2026 v.2
- OneChronos UK MTF Rulebook - 2026 v.2
- OneChronos UK & EU Subscriber Agreement v.1
- OneChronos Reference Data & Tick Table Specification v1.1
- OCXE_Ref Data
- OCXE_Tick Table
- OCXL_Ref Data
- OCXL_Tick Table
- OneChronos EMEA Market Data Feed Specification v1.2
- OneChronos EU MTF Rulebook - 2025 v.1 Blacklined
- OneChronos UK MTF Rulebook - 2025 v.1 Blacklined