F Antidote++(4) — persistent ~156 gp post-tax spread on a range-bound PvM commodity killed

Antidote++(4) sustains a 150–200 gp post-tax spread because PvM supply (Venenatis/Scorpia runners, COX teams dumping 4-dose antifire++ at the GE floor) and demand (PvMers paying the listed sell-up for inventory refills) do not overlap on patience. The 30-day daily avg_high-avg_low gap ranges 116–302 gp and stays mean-reverting inside a 6,800–8,526 band — the spread is persistent and the closes are flat, so a patient flipper collecting the spread at full buy limit is the system, not the anomaly.

Entry: Place buy offer at 8,492 gp, 4,000 units, refresh each 4 h cycle when margin ≥ 100 gp.
Exit: Sell instantly at 8,824 gp (or higher) for any fill; convert buy fills to sell offers same cycle.

Kill switch: A sustained 24 h close below 7,300 (below the 30 d range floor), OR margin collapses below 60 gp for 2 consecutive evaluations, OR a PvM combat rework / BIS change re-prices the item. Kill_price 8,200 protects against single-day dislocations; standing down occurs on kill hit.

From run 448 · F-antidote-plus-plus-4-20260801