Option calculator FTD Detector

FTD Detector

Market timing · static snapshot

William O’Neil Follow-Through Day rules for major indexes. This page loads a precomputed snapshot (data/scan.json) written by cron — refresh reloads the file, it does not call live market APIs from your browser.

Snapshot · —

Signal

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Reading data/scan.json (updated by cron, not live on each click).

How Follow-Through Day works · static hosting
  1. Market is in a correction.
  2. First day an index closes higher = Day 1 of a rally attempt.
  3. Days 2–3 don’t need to be up — the rally stays alive as long as Day 1’s low holds.
  4. On Day 4–7, watch for a major index to gain ≥1.25% on higher volume than the prior day → Follow-Through Day.

Numbers change when the cron job runs generate.py — not on every page click. Not every FTD works. Educational only — not financial advice.

Price · last 90 sessions

Rally attempt history

Status Day 1 Day 1 low FTD / fail Day # Gain Vol ratio Notes