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Algorithmic Trading

A trading algorithm acts through a volatile session. The FCA requests a full reconstruction, exportable in MiFID II format.

The situation

A trading algorithm executes through a fast, volatile session. Afterwards the FCA requests a full reconstruction of what the algorithm did and why, in the format their systems consume. Aegis Trace sealed each algorithmic decision as it happened, so the firm exports a complete, ordered reconstruction in MiFID II format on demand.

The regulations

  • MiFID II RTS 6
  • MiFID II RTS 25
  • FCA MAR
  • Market Abuse Regulation

The evidence

Each algorithmic action is sealed with its trigger.

POST /v1/decisions
{
  "decision": "submit_order",
  "regime": "MIFID_II_RTS6",
  "signal": { "spread": 0.0012, "imbalance": "buy" },
  "order": { "side": "sell", "qty": 4200, "tif": "IOC" }
}

Exportable as an ordered MiFID II reconstruction.

{
  "certificate_id": "crt_at_5b18",
  "status": "sealed",
  "decision": "submit_order",
  "regime": "MIFID_II_RTS6",
  "issued_at": "2026-03-14T09:21:07Z",
  "inputs_hash": "sha256:3f8a…c1d2",
  "model": { "name": "decision-engine", "version": "4.2.1" },
  "signature": {
    "alg": "ed25519",
    "value": "MEUCIQD…Qz9w",
    "anchored": "rfc3161"
  }
}

What the regulator receives

A time-ordered, signed reconstruction of every algorithmic action and its trigger across the session, exportable directly in MiFID II format.

Evidence the moment the decision is made.

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