COT Index API
The normalised Commitments-of-Traders positioning signal traders actually act on, computed live from the US CFTC public reporting API — no key. A raw COT net-position number means little on its own: "large speculators are +176,020 contracts net long gold" tells you nothing until you know whether that is high or low versus history. The COT Index fixes that by normalising each trader group's current net futures position to a 0-100 percentile over a lookback window (the classic Larry Williams 156-week / three-year COT Index): 100 = the most net-long that group has been in the window, 0 = the most net-short. Above 80 marks a crowded long extreme (contrarian bearish), below 20 a crowded short extreme (contrarian bullish). The index endpoint returns one market's COT Index for both the large speculators (non-commercials) and the commercial hedgers, with the current net, the window min/max, the week-over-week change and an extreme flag. The screener endpoint computes the index across a curated set of 17 FX, stock-index, metal, energy and grain futures and ranks them, surfacing which markets sit at a positioning extreme right now. This is the normalised positioning-signal cut — distinct from the raw COT-report feed (which serves the weekly long/short contract counts), and from the price, open-interest and options-positioning APIs. It turns the report into the signal.
api.oanor.com/cotindex-api
