audit: harden Oanda execution lifecycle (close-fill, netting, races, fail-closed config)
2026-08-04 Fable 5 QA audit, Batch A. All fixes are execution-robustness only — no signal code touched (git diff scope: daemon/executor/tests). Findings verified by runnable repros before fixing (h3 harness): - close_trade: a 200 whose close order was created but NOT filled (e.g. MARKET_HALTED during the settlement pause) now raises instead of returning; the daemon's timeout path keeps tracking and retries. The old path popped state and orphaned a live position forever (reconciliation was boot-only). - place_market_order: positionFill=OPEN_ONLY — on a netting account an opposite-side order can no longer silently close an untracked position; the divergence surfaces as an order cancel. - _execute_trade: a fill without tradeOpened (netting close/reduce) and any placement OandaAPIError (server may have filled before a network timeout) now trigger _reconcile_positions instead of silent return. - _discover_existing_positions → lock-guarded _reconcile_positions, callable mid-run; adoption of a position with NO broker stop now screams (CRITICAL + per-bar warning) instead of computing sl=entry, risk=0 and silently never trailing. - _manage_trailing: snapshot deep-copies per-trade dicts (no mutation of live state outside the lock); write-back skips trades popped by _check_closed_trades mid-iteration (no ghost resurrection). - Fail-closed config: unknown OANDA_QUALITY_GATE refuses to start (previously a typo silently became the most permissive gate "C"); non-integer OANDA_LOT_SIZE/MAX_HOLD_BARS exit with a clear message. Suite: 302 → 312 tests (Module 21), all green. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01UnZkzeFcTu9agFg8BDh2tn
This commit is contained in:
Harwinder Sekhon
+128
-52
@@ -90,8 +90,17 @@ STATE_FILE = os.path.join(
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def _oanda_setting_int(env_key: str, json_key: str, default: int) -> int:
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env = os.environ.get(env_key)
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if env:
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return int(env)
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return int(get_app_config().oanda_settings.get(json_key, default))
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try:
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return int(env)
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except ValueError:
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raise SystemExit(
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f"{env_key}={env!r} is not an integer — refusing to start")
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try:
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return int(get_app_config().oanda_settings.get(json_key, default))
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except (TypeError, ValueError):
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raise SystemExit(
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f"config.json oanda.{json_key} is not an integer — "
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f"refusing to start")
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def _oanda_setting_str(env_key: str, json_key: str, default: str) -> str:
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@@ -165,7 +174,13 @@ class TradingDaemon:
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base_url = oanda_base_url()
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lot_size = _oanda_setting_int("OANDA_LOT_SIZE", "lot_size", 1)
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self._quality_gate = _oanda_setting_str(
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"OANDA_QUALITY_GATE", "quality_gate", "C")
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"OANDA_QUALITY_GATE", "quality_gate", "C").strip()
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if self._quality_gate not in QUALITY_RANK:
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# Fail CLOSED: an unrecognized gate must never silently fall
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# back to the most permissive rank (QUALITY_RANK.get default).
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raise SystemExit(
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f"OANDA_QUALITY_GATE/quality_gate {self._quality_gate!r} "
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f"is not one of {sorted(QUALITY_RANK)} — refusing to start")
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self._max_hold_bars = _oanda_setting_int(
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"OANDA_MAX_HOLD_BARS", "max_hold_bars", 300)
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self._price_precision = PAIR_INFO[SYMBOL]["price_precision"]
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@@ -275,60 +290,86 @@ class TradingDaemon:
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# ── Position discovery (restart recovery) ──────────────────────
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def _discover_existing_positions(self) -> None:
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self._reconcile_positions("boot discovery")
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def _reconcile_positions(self, reason: str) -> None:
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"""Re-sync tracked state with the broker's open trades. Safe to
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call mid-run (lock-guarded); used at boot and whenever a fill or
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placement error suggests state and broker may have diverged."""
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try:
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open_trades = self._executor.get_open_trades(INSTRUMENT)
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except OandaAPIError:
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logger.exception("Failed to query open trades at boot")
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logger.exception(
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"Failed to query open trades (%s) — reconcile skipped",
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reason)
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return
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saved = self._state.get("trades", {})
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live_ids = {t["id"] for t in open_trades}
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stale = [tid for tid in saved if tid not in live_ids]
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for tid in stale:
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logger.info(
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"Stale trade %s in state file (closed on Oanda), removing", tid)
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del saved[tid]
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with self._state_lock:
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saved = self._state.get("trades", {})
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for trade in open_trades:
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tid = trade["id"]
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if tid in saved:
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stale = [tid for tid in saved if tid not in live_ids]
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for tid in stale:
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logger.info(
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"Recovered trade %s from state: %s %s @ %.2f, SL %.2f",
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tid, saved[tid].get("direction"), INSTRUMENT,
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saved[tid].get("entry"), saved[tid].get("current_sl"))
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continue
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"Stale trade %s in state file (closed on Oanda), "
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"removing", tid)
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del saved[tid]
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direction = "BUY" if float(trade.get("currentUnits", 0)) > 0 else "SELL"
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entry = float(trade.get("price", 0))
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sl_order = trade.get("stopLossOrder", {})
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sl = float(sl_order.get("price", entry))
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risk = abs(entry - sl) if sl else 1.0
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for trade in open_trades:
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tid = trade["id"]
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if tid in saved:
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logger.info(
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"Recovered trade %s from state: %s %s @ %.2f, SL %.2f",
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tid, saved[tid].get("direction"), INSTRUMENT,
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saved[tid].get("entry"), saved[tid].get("current_sl"))
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continue
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saved[tid] = {
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"tf": "H1",
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"direction": direction,
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"entry": entry,
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"sl_initial": sl,
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"current_sl": sl,
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"risk": risk,
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"peak": entry,
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"trail_armed": False,
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"trail_arm_r": 0.6,
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"trail_dist_r": 0.75,
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"bars_held": 0,
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"last_bar_ts": None,
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"signal_bar_ts": None,
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}
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logger.info(
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"Adopted unknown trade %s: %s @ %.2f, SL %.2f, risk %.2f "
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"(conservative defaults)",
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tid, direction, entry, sl, risk)
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direction = ("BUY" if float(trade.get("currentUnits", 0)) > 0
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else "SELL")
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entry = float(trade.get("price", 0))
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sl_order = trade.get("stopLossOrder") or {}
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sl_price = sl_order.get("price")
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if sl_price is None:
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# No broker-side stop at all: risk is undefined, so the
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# trailing model cannot manage this trade. Scream — a
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# naked position needs a human (or a policy) to set a
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# stop; fabricating one here would invent trading
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# behavior the books never validated.
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logger.critical(
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"Adopted trade %s (%s @ %.2f) has NO STOP LOSS on "
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"the broker — it will NOT be trailed. Set a stop "
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"manually or close it.", tid, direction, entry)
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sl = entry
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risk = 0.0
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else:
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sl = float(sl_price)
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risk = abs(entry - sl)
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self._state["trades"] = saved
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_save_state(self._state)
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saved[tid] = {
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"tf": "H1",
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"direction": direction,
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"entry": entry,
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"sl_initial": sl,
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"current_sl": sl,
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"risk": risk,
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"peak": entry,
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"trail_armed": False,
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"trail_arm_r": 0.6,
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"trail_dist_r": 0.75,
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"bars_held": 0,
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"last_bar_ts": None,
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"signal_bar_ts": None,
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}
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logger.info(
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"Adopted unknown trade %s: %s @ %.2f, SL %.2f, risk %.2f "
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"(conservative defaults)",
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tid, direction, entry, sl, risk)
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self._state["trades"] = saved
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_save_state(self._state)
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logger.info(
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"Position discovery: %d active trade(s)", len(saved))
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"Position reconcile (%s): %d active trade(s)", reason, len(saved))
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# ── Candle-boundary loop ───────────────────────────────────────
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@@ -521,9 +562,15 @@ class TradingDaemon:
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stop_loss=ts.stop_loss,
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)
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except OandaAPIError:
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# The order is never retried (a timeout after a server-side
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# fill would double-up on retry), but the server MAY have
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# filled before the error reached us — reconcile so a live
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# position can't stay untracked until the next restart.
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logger.exception(
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"Failed to place %s order for %s %s",
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"Failed to place %s order for %s %s — reconciling "
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"broker positions",
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ts.direction, SYMBOL, tf.value)
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self._reconcile_positions("order placement error")
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return
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fill_tx = result.get("orderFillTransaction")
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@@ -535,7 +582,16 @@ class TradingDaemon:
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trade_opened = fill_tx.get("tradeOpened", {})
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trade_id = trade_opened.get("tradeID")
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if not trade_id:
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logger.warning("No trade ID in fill response")
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# A fill with no tradeOpened means the order interacted
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# with an existing broker position (tradesClosed /
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# tradeReduced on a netting account) — state and broker
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# have diverged. Surface it and re-sync instead of
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# silently forgetting a real fill.
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logger.critical(
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"Order FILLED but opened no trade (netting close/"
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"reduce?) — fill: closed=%s reduced=%s. Reconciling.",
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fill_tx.get("tradesClosed"), fill_tx.get("tradeReduced"))
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self._reconcile_positions("fill without tradeOpened")
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return
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fill_price = float(fill_tx.get("price", ts.entry_price))
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@@ -587,8 +643,12 @@ class TradingDaemon:
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# ── Trailing stop management ───────────────────────────────────
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def _manage_trailing(self, tf: Timeframe) -> None:
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# Copy the per-trade dicts too: the loop mutates info (peak,
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# bars_held, last_bar_ts) and must not touch live state outside
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# the lock — another thread may be serializing it in _save_state.
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with self._state_lock:
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trades = dict(self._state.get("trades", {}))
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trades = {tid: dict(info)
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for tid, info in self._state.get("trades", {}).items()}
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for trade_id, info in trades.items():
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if info.get("tf") != tf.value:
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@@ -634,13 +694,16 @@ class TradingDaemon:
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self._executor.close_trade(trade_id)
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except OandaAPIError:
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# Keep tracking — the trade is still live on the
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# broker; we retry the close at the next bar.
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# broker (incl. a 200 whose close order was cancelled,
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# e.g. MARKET_HALTED — close_trade raises on no-fill);
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# we retry the close at the next bar.
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logger.exception(
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"Failed to close timed-out trade %s — will retry",
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trade_id)
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with self._state_lock:
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self._state["trades"][trade_id] = info
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_save_state(self._state)
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if trade_id in self._state["trades"]:
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self._state["trades"][trade_id] = info
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_save_state(self._state)
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continue
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with self._state_lock:
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self._state["trades"].pop(trade_id, None)
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@@ -651,6 +714,14 @@ class TradingDaemon:
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bar_high = float(last_bar["High"])
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bar_low = float(last_bar["Low"])
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if info.get("risk", 0) <= 0:
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# Adopted naked position (no broker SL → risk undefined):
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# never manageable by the trailing model — keep it loud
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# instead of silently skipping forever.
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logger.warning(
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"Trade %s has risk<=0 (no stop loss) — trailing "
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"skipped; set a stop manually", trade_id)
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new_sl = self._compute_trail(info, bar_high, bar_low)
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if new_sl is not None:
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@@ -667,8 +738,13 @@ class TradingDaemon:
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trade_id)
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with self._state_lock:
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self._state["trades"][trade_id] = info
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_save_state(self._state)
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# Write back ONLY if the trade is still tracked — another
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# loop's _check_closed_trades may have popped it while we
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# iterated (broker-side close). Re-inserting would create
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# a ghost that blocks new entries.
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if trade_id in self._state["trades"]:
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self._state["trades"][trade_id] = info
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_save_state(self._state)
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def _compute_trail(
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self, info: Dict, bar_high: float, bar_low: float
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