Coil Sector Drill-Down

Every stock in one sector, scored — GET /api/board/sector?name=Energy (or ?etf=XLE) returns each member of that sector with the full Coil read: opportunity 0-100 + percentile, entry quality and state, hold strength, growth score, overnight gap-risk score, leadership flag and dollar volume, ranked by opportunity, plus the sector's own ETF row. All 20 sector groups across the S&P 500, Nasdaq-100 and macro book. ~5-min refresh. Research, not advice.