The Black LedgerAgent control layer
Simulation/No broker attached

Open source Risk control for trading agents

No agent touches capital without a verdict.

The Black Ledger sits between an AI-generated trade idea and execution. It records the evidence, applies hard limits, and stops at a human approval gate.

View source

A working front-end demo. It cannot place orders.

Portfolio$24,820.16
Proposed risk1.93%
Daily drawdown0.80%
Hard limits6 active

Active case / 0347

NVDA · Long proposal

Review not started
Reference price$184.12
Order size$480.00
Invalidation$171.00
Machine thesis

Earnings revisions and data-center demand support a bounded momentum position. The order remains below portfolio and sector concentration limits.

Evidence packet3 / 3 available
  1. 01Earnings call transcript42 min
  2. 02Analyst estimate revisions1 hr
  3. 03Market breadth snapshot12 min

Deterministic policy

Language models do not set the limits.

Not evaluated
01
Order value

$480 / $500 maximum

Pending
02
Position weight

1.93% / 10% maximum

Pending
03
Sector exposure

19.70% / 25% maximum

Pending
04
Daily drawdown

0.80% / 2% halt

Pending
05
Symbol allowlist

NVDA is permitted

Pending
06
Human approval

Required before execution

Pending

Append-only record

Decision ledger

03 entries
TimeEventReasonState
14:03:12Proposal filedEvidence packet attachedRecorded
14:03:13Policy loadedSix limits activeRecorded
14:03:13Execution gateNo broker connectorSealed