Englische Quelle — Übersetzung ausstehend — Englisch
First-Run Safety (Demo → Shadow → Live)
This engine executes on a real broker. The repository's own first-run guidance
is a strict ladder — do not skip steps.
| Step | Action | Why |
|---|---|---|
| 1️⃣ | Log into a DEMO account in MT5 (File → Open an Account → Practice/Demo), confirm the account number/label before touching the bot | LIVE and demo accounts can look identical in MT5's login window |
| 2️⃣ | MT5: Tools → Options → Expert Advisors → tick "Allow Algo Trading" | Without this, orders are rejected |
| 3️⃣ | Copy configs/live.yaml → configs/demo.yaml; set demo credentials; confirm risk.max_concurrent_positions: 1, risk.risk_per_trade_pct (e.g. 0.5), risk.max_account_drawdown_pct | Never touch a live config while real money can be reached |
| 4️⃣ | Run SHADOW first (nexus start --mode shadow) for days; review the dashboard + Telegram reports | Proves model, signals and gates before any execution |
| 5️⃣ | Run the test suite weekly (pytest tests/unit tests/integration) | Catches regressions before they reach a live account |
| 6️⃣ | Only then consider LIVE with a small balance you can afford to lose, risk_per_trade_pct: 0.25 or lower | Leveraged XAUUSD scalping carries extreme risk |
Account-identity fail-safe
The live adapter refuses to connect to a terminal logged into a different
account than configured (BUG-142): the account-identity check is enforced at
connect time, not by convention.
Safety invariants (engine-enforced)
nexus startnever defaults to LIVE — PAPER is the default; LIVE requires
an explicit interactive confirmation after printing the full risk panel.
- Shadow runs carry
simulated=Trueand hold zero order authority: no order
can be placed, modified or closed.
- Research/strategy/news workers never hold order authority or a risk handle.
- Risk engine (
RiskEngine) is authoritative for sizing boundaries: margin
clamps (≤ 20% free margin), tier caps, single-position exposure cap,
HARD_MAX_LOTS = 10.0, MAX_TOTAL_EXPOSURE = 1.
- Circuit breaker → SAFE_MODE after repeated rejections; order-churn throttle;
kill switch via dashboard/CLI.
- Pre-flight doctor gates every launch: missing MT5 terminal, invalid config or
unsupported platform ⇒ the engine refuses to start.
- Model promotion is strictly operator-gated; candidates never promote
themselves; shadow never mutates execution.
Also read
- Project status — what is certified vs experimental
- Runtime">https://github.com/Opselon/NexusTradingForexBot/blob/main/agents/runtime_invariants.md">Runtime invariants (INV-001…)
- Troubleshooting