Compression-Trap Reversal Off-Crypto: Buy Spot Gold's Failed Downside Break of an NR7 Day, Fixed 3-Session Clock (XAUUSD.SPOTMETAL 1-DAY, long-only event trade, flat ~85% of the time, 2003-2026)

This is an out-of-asset-class replication of the factory's most-replicated promoted mechanism, with the rules frozen. The failed downside break of an NR7 day with a fixed three-day exit was promoted on Bybit perps (742 trades, PF 1.39, average trade 0.99%), OKX swaps (940 trades, PF 1.39, 1.11%), Binance spot and Hyperliquid (413 trades, PF 1.47, 1.10%). All four are crypto alt panels. They share one market structure (retail leverage, stop clusters under obvious range lows) and their price series are highly correlated, so they do not show whether the effect is a general stop-run/liquidity phenomenon or something peculiar to crypto alts. Spot gold is a separate price series, macro-driven and traded on a different session structure. It has about 23 years of daily history (Dukascopy, from 2003), which by itself is four times the crypto panels' span, and it is almost untouched in the corpus (SPOTMETAL is 0.3% of experiments). No NR7 test has ever run on gold. Rules, unchanged from the crypto panels: an NR7 day is a trading day whose high-low range is the narrowest of the last 7 trading days, itself included. If the NEXT trading day closes below the NR7 day's low, buy at that session's close decision. The position is held for exactly 3 trading days and then closed. No stop, no target, no trailing; one position at a time; events that fire while a position is open are ignored. Session handling: a gold trading day runs from 18:00 New York (previous day) to 17:00 New York; the 1-DAY bar's timestamp is that 17:00 close. Weekends and the daily 17:00-18:00 break are closed market, not gaps. Execution is the platform's session-venue next_open_fill rule (supported): a decision made on a daily bar's close fills at the next session's open (18:00 NY, one hour later), and the 3-day exit decided on the third holding day's close fills at the following session's open. No substitution is needed. Each held night pays the modeled overnight financing (long pays fed funds + 2.5%/yr, Wednesday counted as 3 days), and the arithmetic below includes it. Event-count pre-registration (lesson L223/L227 discipline): only 2003-05 to 2007-12 is in the local catalog so far (the Dukascopy backfill is in progress; the rest is collected on demand). That window has 48 qualifying events, about 10.4 per year, so the full 2003-2026 history should yield about 230-240 events. Arithmetic: gold's daily std is about 1.0-1.1% against about 4-5% for the crypto alts. Scaling the crypto panels' about 0.22 daily-sigma capture per trade gives about 0.22-0.25% gross per trade on gold. Costs per round trip: about 0.015% spread, plus financing over about 3.6 nights on average (Wednesday triple). Financing is about 0.03% in the low-rate years (2009-2015, 2020-2021) and about 0.065% at 4% fed funds, so total cost is about 0.05-0.08%. Expected net is about 0.15% of notional per trade, roughly 2.5-3x the cost. Sizing: 1.5x equity notional per event on the 20x-margin venue. Position volatility is about 1.5 x 17% ≈ 26% annualized, well inside the 120% cap. A worst historical 3-day gold drop of about 8-9% (2013, 2020) costs about 12-13% of equity, inside the 15% max-trade-loss limit. The book sits about 50 daily moves from liquidation at 20x margin. The strategy is flat about 85% of the time, so realized strategy volatility is about 10%. Risk route: signal/time exit (fixed 3-session clock) with risk-profile sizing (conservative profile: 1.5x ≤ 5x cap). No stop is invented, because the source mechanism has none. Long-only on purpose: lesson L230 warns that the mirrored short arm of absorption/trap designs has not worked and needs its own measurement first. The analyst should also read the result against the buy-and-hold drawdown comparison from lesson L224/L170: gold's buy-and-hold drawdown since 2011 is about 45%, against a pre-registered 15% here.