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PythagorasGoal/src/live/pairs_worker.py
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Adriano Dal Pastro 82c05f6f81 fix(exec): code-review serale — guard anti-posizione-nuda sul netting + verità per-frazione 
7 finder paralleli sul diff della giornata (8adf388..HEAD), fix dei confermati:

CRITICI (money-path):
- close_amount: GUARD stato-stantio sul fallback netting — il residuo
  non-reduce-only e' consentito solo fino al gap (conto reale - libri degli
  altri worker - orfani) nella direzione della chiusura (src/live/books.py =
  fonte unica, usata anche dal reconciler). Senza guard, un close su stato
  stantio (DSL scattato in outage, flatten manuale) APRIVA una posizione nuda
  a taglia piena bookata come 'chiusura verificata'. Fail-safe se il gap non
  e' calcolabile. Check polvere PRIMA di _quantize_step (che clampa al lotto
  minimo: un residuo 1e-17 diventava un ordine nudo da un lotto).
- _real_close: market_amt = filled_amount anche a merged verified=False (i
  contratti chiusi dal reduce-only non si buttano se il leg netting fallisce);
  REAL_CLOSE_PARTIAL non piu' gateato su verified (era soppresso proprio nel
  caso parziale reale).
- pairs: verita' per-FRAZIONE di gamba (gross proporzionale al fillato, orfano
  = solo il residuo — prima falsava reconciler e real_capital della parte gia'
  chiusa); REAL_OPEN_PAIR booka filled_amount; docstring applied corretta.
- open_pair unwind: chiude il FILLATO, non il richiesto (senza il cap silenzioso
  del reduce-only avrebbe mangiato quota altrui).
- place_tp_limit: quantize CONSERVATIVO (sell=floor/buy=ceil) — il rounding al
  tick piu' vicino poteva mettere il resting oltre il TP sim -> tocco genuino
  classificato phantom sistematicamente.

ROBUSTEZZA/OSSERVABILITA':
- runner: WORKER_ERROR_STREAK a 5 e poi ogni 50 poll + recovery RIPRESO +
  flag real_in_position nell'alert (prima: one-shot a n==5, poi silenzio).
- _tp_phantom: TTL 120s sul verdetto (era ~50 HTTP/h per worker a barra
  fantasma); merge notes con entrambi gli order_id (audit-trail).
- reset_flatten: _quantize_step Decimal (round float produceva amount che
  Deribit rifiuta); hourly_report: book XS01 con gambe SHORT visibili (abs).
- validate_xsec_worker: POS/LEV importati (non hardcoded); xs01_tranche:
  regression-lock ESEGUITO vs xsec_sim; reconcile su src/live/books;
  drift_monitor: rolling vettoriale + exit code 1 su warn.

Test: +4 guard/dust, fixture filled_amount -> 114 passed.
Deferiti (TODO): resting esposti al netting, lifecycle orphan_legs, finestra
trade-history TP_PHANTOM, validazione feed a monte, dedup minori.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
2026-06-11 21:36:30 +00:00

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"""PairsWorker — paper trading a 2 GAMBE per la famiglia PR01 (spread reversion).
Market-neutral: long asset A / short asset B (o viceversa) sullo z-score del log-ratio.
Distinto dallo StrategyWorker single-leg: gestisce due strumenti, due prezzi di
ingresso, e conta le fee su ENTRAMBE le gambe (2*fee_rt*lev = 0.20% RT/coppia con
fee_rt=0.001). Semantica identica al backtest scripts/analysis/pairs_research.pairs_sim:
r[i] = log(closeA[i]/closeB[i]); z[i] = (r[i]-SMA_n(r)[i]) / STD_n(r)[i] (causale)
ENTRY a close[i]: z<=-z_in -> LONG ratio (long A / short B); z>=+z_in -> SHORT ratio
EXIT: |z| <= z_exit (rientro) oppure time-limit max_bars
filtro candele sporche: salta l'ingresso se |dr[i]| > jump_max
PnL = (retA - retB) * direction * lev - 2*fee_rt*lev (notional uguale per gamba)
Stato persistente (resume al restart) e log come StrategyWorker.
"""
from __future__ import annotations
import json
from datetime import datetime, timezone
from pathlib import Path
import numpy as np
import pandas as pd
from src.live.telegram_notifier import notify_event
class PairsWorker:
def __init__(
self,
asset_a: str,
asset_b: str,
tf: str,
params: dict | None = None,
capital: float = 1000.0,
position_size: float = 0.15,
leverage: float = 3.0,
fee_rt: float = 0.001, # per gamba RT; la coppia paga 2x
name: str = "PR01_pairs_reversion",
data_dir: Path = Path("data/paper_trades"),
executor=None, # PairsExecutionClient: esecuzione REALE shadow a 2 gambe
exec_instruments: dict | None = None, # {asset: instrument USDC}
real_truth: bool = False,
):
self.asset_a = asset_a
self.asset_b = asset_b
self.tf = tf
self.name = name
p = params or {}
self.n = int(p.get("n", 50))
self.z_in = float(p.get("z_in", 2.0))
self.z_exit = float(p.get("z_exit", 0.75))
self.max_bars = int(p.get("max_bars", 72))
self.jump_max = float(p.get("jump_max", 0.08))
# flat-skip (timeframe sub-orari, es. 15m): non entrare/uscire su candele flat
# (O=H=L=C, prezzo stale/liquidita' zero -> fill non eseguibile). LIVE-REALIZABLE:
# l'uscita arma exit_ready e si esegue alla prima barra PULITA. Parita' col backtest
# pairs_research.pairs_sim_flat(flat_skip=True). Default off = comportamento 1h storico.
self.flat_skip = bool(p.get("flat_skip", False))
self.initial_capital = capital
self.position_size = position_size
self.leverage = leverage
self.fee_rt = fee_rt
self.worker_id = f"{name}__{asset_a}_{asset_b}__{tf}"
self.work_dir = data_dir / self.worker_id
self.work_dir.mkdir(parents=True, exist_ok=True)
self.trades_path = self.work_dir / "trades.jsonl"
self.status_path = self.work_dir / "status.json"
self.capital = capital
self.in_position = False
self.direction = 0 # +1 long ratio (long A/short B), -1 short ratio
self.entry_a = 0.0
self.entry_b = 0.0
self.entry_z = 0.0
self.entry_time = ""
self.bars_held = 0
self.exit_ready = False # flat-skip: condizione di uscita armata, attende barra pulita
self.total_trades = 0
self.total_wins = 0
self.last_bar_ts = 0
self.started_at = datetime.now(timezone.utc).isoformat()
# --- esecuzione REALE shadow a 2 gambe (sim resta la verita' che guida) ---
self.executor = executor
self.exec_instruments = exec_instruments or {}
self.inst_a = self.exec_instruments.get(asset_a)
self.inst_b = self.exec_instruments.get(asset_b)
self.execution_enabled = bool(executor and self.inst_a and self.inst_b)
# REAL-TRUTH (2026-06-10): come StrategyWorker — `capital` aggiornato dal
# PnL dei fill reali (2 gambe, fee reali); sim solo diagnostica nel log.
self.real_truth = bool(real_truth and self.execution_enabled)
self.real_capital = capital
self.real_in_position = False
self.real_dir = 0
self.real_side_a = "" # lato della gamba A all'apertura ("buy"/"sell")
self.real_side_b = ""
self.real_amount_a = 0.0 # amount eseguito per gamba (base-coin)
self.real_amount_b = 0.0
self.real_entry_a = 0.0 # prezzo di fill per gamba
self.real_entry_b = 0.0
self.real_notional_a = 0.0 # USD effettivi per gamba
self.real_notional_b = 0.0
self.real_entry_fee = 0.0
self.real_trades = 0
self.real_first_notified = False
self.orphan_legs: list[dict] = [] # gambe respinte dal netting (persistite)
self._load_state()
self._save_state()
# ---------------- persistenza ----------------
def _load_state(self):
if not self.status_path.exists():
self._log("INIT", {"capital": self.capital, "pair": f"{self.asset_a}/{self.asset_b}",
"tf": self.tf, "params": {"n": self.n, "z_in": self.z_in,
"z_exit": self.z_exit, "max_bars": self.max_bars}})
return
with open(self.status_path) as f:
s = json.load(f)
self.capital = s.get("capital", self.initial_capital)
self.in_position = s.get("in_position", False)
self.direction = s.get("direction", 0)
self.entry_a = s.get("entry_a", 0.0)
self.entry_b = s.get("entry_b", 0.0)
self.entry_z = s.get("entry_z", 0.0)
self.entry_time = s.get("entry_time", "")
self.bars_held = s.get("bars_held", 0)
self.exit_ready = s.get("exit_ready", False)
self.total_trades = s.get("total_trades", 0)
self.total_wins = s.get("total_wins", 0)
self.last_bar_ts = s.get("last_bar_ts", 0)
self.started_at = s.get("started_at", self.started_at)
self.real_capital = s.get("real_capital", self.initial_capital)
self.real_in_position = s.get("real_in_position", False)
self.real_dir = s.get("real_dir", 0)
self.real_side_a = s.get("real_side_a", "")
self.real_side_b = s.get("real_side_b", "")
self.real_amount_a = s.get("real_amount_a", 0.0)
self.real_amount_b = s.get("real_amount_b", 0.0)
self.real_entry_a = s.get("real_entry_a", 0.0)
self.real_entry_b = s.get("real_entry_b", 0.0)
self.real_notional_a = s.get("real_notional_a", 0.0)
self.real_notional_b = s.get("real_notional_b", 0.0)
self.real_entry_fee = s.get("real_entry_fee", 0.0)
self.real_trades = s.get("real_trades", 0)
self.real_first_notified = s.get("real_first_notified", False)
self.orphan_legs = s.get("orphan_legs", [])
self._log("RESUME", {"capital": round(self.capital, 2),
"total_trades": self.total_trades, "in_position": self.in_position,
"real_capital": round(self.real_capital, 2),
"real_in_position": self.real_in_position})
def _save_state(self):
state = {
"capital": round(self.capital, 2), "in_position": self.in_position,
"direction": self.direction, "entry_a": self.entry_a, "entry_b": self.entry_b,
"entry_z": round(self.entry_z, 4), "entry_time": self.entry_time,
"bars_held": self.bars_held, "exit_ready": self.exit_ready,
"total_trades": self.total_trades,
"total_wins": self.total_wins, "last_bar_ts": self.last_bar_ts,
"started_at": self.started_at, "last_update": datetime.now(timezone.utc).isoformat(),
"real_capital": round(self.real_capital, 4), "real_in_position": self.real_in_position,
"real_dir": self.real_dir, "real_side_a": self.real_side_a, "real_side_b": self.real_side_b,
"real_amount_a": self.real_amount_a, "real_amount_b": self.real_amount_b,
"real_entry_a": self.real_entry_a, "real_entry_b": self.real_entry_b,
"real_notional_a": self.real_notional_a, "real_notional_b": self.real_notional_b,
"real_entry_fee": self.real_entry_fee, "real_trades": self.real_trades,
"real_first_notified": self.real_first_notified,
"orphan_legs": self.orphan_legs,
}
with open(self.status_path, "w") as f:
json.dump(state, f, indent=2)
def _log(self, event: str, data: dict | None = None):
entry = {"ts": datetime.now(timezone.utc).isoformat(), "worker": self.worker_id,
"event": event, **(data or {})}
with open(self.trades_path, "a") as f:
f.write(json.dumps(entry) + "\n")
print(f" [{self.worker_id}] {event}: {json.dumps(data or {}, default=str)}")
def _notify(self, event: str, data: dict | None = None):
notify_event(event, {"worker": self.worker_id, **(data or {})})
# ---------------- segnale ----------------
def _zscore(self, ca: np.ndarray, cb: np.ndarray) -> tuple[np.ndarray, np.ndarray]:
r = np.log(ca / cb)
ma = pd.Series(r).rolling(self.n).mean().values
sd = pd.Series(r).rolling(self.n).std().values
z = (r - ma) / np.where(sd == 0, np.nan, sd)
dr = np.abs(np.diff(r, prepend=r[0]))
return z, dr
# ---------------- trading ----------------
def _open(self, d: int, ca: float, cb: float, z: float):
self.in_position = True
self.direction = d
self.entry_a, self.entry_b, self.entry_z = ca, cb, z
self.entry_time = datetime.now(timezone.utc).isoformat()
self.bars_held = 0
self.exit_ready = False
data = {"direction": "long_ratio" if d == 1 else "short_ratio",
"long_leg": self.asset_a if d == 1 else self.asset_b,
"short_leg": self.asset_b if d == 1 else self.asset_a,
"entry_a": round(ca, 4), "entry_b": round(cb, 4), "z": round(z, 3),
"capital": round(self.capital, 2)}
self._log("OPEN", data); self._notify("OPENED", data)
if self.execution_enabled:
self._real_open_pair(d, ca, cb)
def _real_open_pair(self, d: int, sim_a: float, sim_b: float):
"""Apertura REALE shadow a 2 gambe (long A/short B se d=1). Notional uguale per
gamba = capital*pos*lev. Logga slippage e fee reali; gestisce il leg-fail."""
notional = self.capital * self.position_size * self.leverage
pf = self.executor.open_pair(self.inst_a, self.inst_b, d, notional, label=self.worker_id)
data = {"dir": d, "inst_a": self.inst_a, "inst_b": self.inst_b,
"notional_leg": round(notional, 2),
"fill_a": pf.leg_a.fill_price, "fill_b": pf.leg_b.fill_price,
"fee_usd": round(pf.leg_a.fee_usd + pf.leg_b.fee_usd, 5),
"verified": pf.verified}
if pf.verified:
self.real_in_position = True
self.real_dir = d
self.real_side_a, self.real_side_b = pf.leg_a.side, pf.leg_b.side
# amount FILLATO, non richiesto (coerente con strategy_worker, 2026-06-11)
self.real_amount_a = pf.leg_a.filled_amount or pf.leg_a.amount
self.real_amount_b = pf.leg_b.filled_amount or pf.leg_b.amount
self.real_entry_a = pf.leg_a.fill_price or sim_a
self.real_entry_b = pf.leg_b.fill_price or sim_b
self.real_notional_a = pf.leg_a.amount * self.real_entry_a
self.real_notional_b = pf.leg_b.amount * self.real_entry_b
self.real_entry_fee = pf.leg_a.fee_usd + pf.leg_b.fee_usd
self._log("REAL_OPEN_PAIR", data)
if not self.real_first_notified:
self._notify("REAL_EXEC_LIVE", data); self.real_first_notified = True
else:
self._log("REAL_OPEN_FAIL", {**data, "note": pf.notes})
self._notify("REAL_OPEN_FAIL", {**data, "note": pf.notes})
self._save_state() # persisti subito il ledger reale (resume-safe sui crash)
def _real_close_pair(self, sim_a: float, sim_b: float, reason: str,
sim_pnl: float) -> tuple[float | None, bool]:
"""Chiusura REALE shadow: richiude entrambe le gambe (netting-aware),
riconcilia PnL reale per-gamba e fee, aggiorna il ledger reale parallelo.
Ritorna (real_pnl, applied): applied=True SOLO se ENTRAMBE le gambe hanno
chiuso per intero con fill verificato — con una gamba orfana il "PnL dello
spread" non esiste e real-truth ricade sul sim DICHIARATO."""
if not self.real_in_position:
return None, False
pf = self.executor.close_pair(self.inst_a, self.inst_b, self.real_side_a,
self.real_side_b, self.real_amount_a, self.real_amount_b,
label=self.worker_id)
# VERITA' PER-GAMBA (audit 2026-06-11): una gamba puo' essere RESPINTA dal
# netting di conto (reduce-only nel verso sbagliato quando un altro worker e'
# nella direzione opposta sullo stesso strumento). Prima il PnL veniva
# calcolato col prezzo SIM per la gamba mai eseguita e sommato al ledger
# reale (3 PnL fantasma il 2026-06-11, gamba ETH orfana sul conto).
# Ora: si booka SOLO il realizzato delle gambe con fill verificato; la gamba
# respinta diventa un ORFANO registrato (persistito) + alert Telegram.
from src.live.execution import contract_spec
for leg in (pf.leg_a, pf.leg_b):
if "netting" in (getattr(leg, "notes", "") or ""):
# reduce-only cappato/respinto, residuo in market puro (v1.1.25)
self._log("NET_CLOSE", {"instrument": leg.instrument, "note": leg.notes})
self._notify("NET_CLOSE", {"instrument": leg.instrument, "note": leg.notes})
# verita' per-FRAZIONE di gamba (code-review 2026-06-11): una gamba puo'
# chiudere PARZIALMENTE (reduce-only cappato + netting negato/fallito) —
# si booka il gross della sola frazione FILLATA e l'orfano registra il
# solo RESIDUO (prima: gross binario tutto-o-niente e orfano a amount
# pieno, che falsava reconciler e real_capital della parte gia' chiusa).
filled_a = min(getattr(pf.leg_a, "filled_amount", 0.0), self.real_amount_a)
filled_b = min(getattr(pf.leg_b, "filled_amount", 0.0), self.real_amount_b)
step_a = contract_spec(self.inst_a).get("step", 0.001)
step_b = contract_spec(self.inst_b).get("step", 0.001)
ok_a = filled_a >= self.real_amount_a - step_a / 2
ok_b = filled_b >= self.real_amount_b - step_b / 2
frac_a = filled_a / self.real_amount_a if self.real_amount_a else 0.0
frac_b = filled_b / self.real_amount_b if self.real_amount_b else 0.0
exit_a = pf.leg_a.fill_price or sim_a
exit_b = pf.leg_b.fill_price or sim_b
# PnL per gamba: dir A = +d (long ratio compra A), dir B = -d
da, db = self.real_dir, -self.real_dir
gross_a = da * (exit_a - self.real_entry_a) / self.real_entry_a * self.real_notional_a
gross_b = db * (exit_b - self.real_entry_b) / self.real_entry_b * self.real_notional_b
exit_fee = pf.leg_a.fee_usd + pf.leg_b.fee_usd
real_pnl = (gross_a * frac_a + gross_b * frac_b
- self.real_entry_fee - exit_fee)
self.real_capital += real_pnl
self.real_trades += 1
self._log("REAL_CLOSE_PAIR", {
"reason": reason, "exit_a": exit_a, "exit_b": exit_b,
"leg_a_ok": ok_a, "leg_b_ok": ok_b,
"filled_a": filled_a, "filled_b": filled_b,
"real_pnl_usd": round(real_pnl, 4), "sim_pnl_usd": round(sim_pnl, 4),
"entry_fee": round(self.real_entry_fee, 5), "exit_fee": round(exit_fee, 5),
"real_capital": round(self.real_capital, 4), "verified": pf.verified})
for ok, inst, side, amt, filled, step in (
(ok_a, self.inst_a, self.real_side_a, self.real_amount_a, filled_a, step_a),
(ok_b, self.inst_b, self.real_side_b, self.real_amount_b, filled_b, step_b)):
residue = amt - filled
if not ok and residue >= step / 2:
orphan = {"instrument": inst, "entry_side": side,
"amount": round(residue, 8),
"ts": datetime.now(timezone.utc).isoformat(), "reason": reason}
self.orphan_legs.append(orphan)
self._notify("PAIR_LEG_ORPHAN", {
"worker": self.worker_id, **orphan,
"note": ("gamba NON chiusa per il residuo indicato (netting "
"negato/fallito): posizione orfana sul conto — "
"risolvere e RIMUOVERE l'orfano dallo status")})
self.real_in_position = False
self.real_dir = 0
self.real_side_a = self.real_side_b = ""
self.real_amount_a = self.real_amount_b = 0.0
self.real_entry_a = self.real_entry_b = 0.0
self.real_notional_a = self.real_notional_b = 0.0
self.real_entry_fee = 0.0
self._save_state()
# applied (real-truth) SOLO se entrambe le gambe hanno chiuso verificate:
# con una gamba orfana il "PnL reale dello spread" non esiste -> meglio il
# fallback sim DICHIARATO che un numero mezzo-reale
return real_pnl, ok_a and ok_b
def _close(self, ca: float, cb: float, z: float, reason: str):
if not self.in_position:
return
ret_a = (ca - self.entry_a) / self.entry_a
ret_b = (cb - self.entry_b) / self.entry_b
gross = (ret_a - ret_b) * self.direction * self.leverage
fee = 2 * self.fee_rt * self.leverage # 2 gambe
net = gross - fee
sim_pnl = self.capital * self.position_size * net
# REAL-TRUTH: chiusura reale PRIMA dell'update ledger (come StrategyWorker)
real_pnl, real_applied = (None, False)
if self.execution_enabled:
real_pnl, real_applied = self._real_close_pair(ca, cb, reason, sim_pnl)
use_real = self.real_truth and real_applied
pnl = real_pnl if use_real else sim_pnl
self.capital = max(self.capital + pnl, 0.0)
is_win = pnl > 0
self.total_trades += 1
self.total_wins += is_win
acc = self.total_wins / self.total_trades * 100 if self.total_trades else 0
data = {"reason": reason, "exit_a": round(ca, 4), "exit_b": round(cb, 4),
"z": round(z, 3), "gross_ret": round(gross * 100, 3), "fee": round(fee * 100, 3),
"net_return": round(net * 100, 3), "pnl": round(pnl, 2),
"capital": round(self.capital, 2), "bars_held": self.bars_held,
"win": bool(is_win), "total_trades": self.total_trades, "accuracy": round(acc, 1)}
if self.real_truth:
data["pnl_source"] = "real" if use_real else "sim_fallback"
data["sim_pnl"] = round(sim_pnl, 2)
if real_pnl is not None:
data["real_pnl"] = round(real_pnl, 4)
self._log("CLOSE", data); self._notify("CLOSED", data)
self.in_position = False
self.direction = 0
self.entry_a = self.entry_b = self.entry_z = 0.0
self.bars_held = 0
def tick(self, df_a: pd.DataFrame, df_b: pd.DataFrame):
"""Chiamato ad ogni poll con gli OHLCV aggiornati delle due gambe."""
if df_a is None or df_b is None or df_a.empty or df_b.empty:
return
# merge OHLC quando disponibile (serve a rilevare le candele flat per il flat-skip);
# se le colonne OHLC mancano, flat resta False -> comportamento close-only invariato.
ohlc = ["open", "high", "low", "close"]
keep_a = ["timestamp"] + [c for c in ohlc if c in df_a.columns]
keep_b = ["timestamp"] + [c for c in ohlc if c in df_b.columns]
m = df_a[keep_a].merge(df_b[keep_b], on="timestamp", how="inner",
suffixes=("_a", "_b")).sort_values("timestamp").reset_index(drop=True)
# Scarta la barra IN FORMAZIONE: entry ED exit valutati SOLO sul close di
# barra COMPLETA, come il backtest (pairs_research: close settled) —
# lezione EXIT-16. Detection condivisa: src.live.bars.
from src.live.bars import last_bar_is_forming
if last_bar_is_forming(m["timestamp"].values):
m = m.iloc[:-1]
if len(m) < self.n + 2:
return
ca, cb = m["close_a"].values, m["close_b"].values
z, dr = self._zscore(ca, cb)
i = len(m) - 1
cur_ts = int(m["timestamp"].iloc[i])
zi = z[i]
if np.isnan(zi):
self._save_state(); return
# flat della barra corrente (entrambe le gambe): O=H=L=C in una delle due
flat_i = False
if self.flat_skip and {"open_a", "high_a", "low_a"}.issubset(m.columns) \
and {"open_b", "high_b", "low_b"}.issubset(m.columns):
fa = (m["open_a"].iloc[i] == m["high_a"].iloc[i] == m["low_a"].iloc[i] == ca[i])
fb = (m["open_b"].iloc[i] == m["high_b"].iloc[i] == m["low_b"].iloc[i] == cb[i])
flat_i = bool(fa or fb)
if self.in_position:
if cur_ts > self.last_bar_ts:
self.bars_held += 1
self.last_bar_ts = cur_ts
# arma l'uscita: |z|<=z_exit (rientro) o time-limit; poi esegui alla 1a barra pulita
if not self.exit_ready and (abs(zi) <= self.z_exit or self.bars_held >= self.max_bars):
self.exit_ready = True
if self.exit_ready and not flat_i:
reason = "mean_revert" if abs(zi) <= self.z_exit else "time_limit"
self._close(float(ca[i]), float(cb[i]), float(zi), reason)
self._save_state()
return
# cerca ingresso (no look-ahead: z[i] usa solo dati <= i); mai su barra stale
if dr[i] <= self.jump_max and not flat_i:
if zi <= -self.z_in:
self._open(1, float(ca[i]), float(cb[i]), float(zi)); self.last_bar_ts = cur_ts
elif zi >= self.z_in:
self._open(-1, float(ca[i]), float(cb[i]), float(zi)); self.last_bar_ts = cur_ts
self._save_state()
@property
def status_summary(self) -> str:
acc = self.total_wins / self.total_trades * 100 if self.total_trades else 0
pos = ("LONG " + self.asset_a if self.direction == 1
else "SHORT " + self.asset_a if self.direction == -1 else "FLAT")
return (f"{self.worker_id}: €{self.capital:.0f} | {self.total_trades}t {acc:.0f}% | {pos}")
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