A spike is flagged when current ATM IV is at least +30%
above the symbol's recent baseline (avg ATM IV of the last 30 days, falling back to HV30).
IV Rank (0-100) shows where current IV sits in its 1-year (min, max) range
from saved snapshots — ≥60 = expensive (sell premium),
≤30 = cheap (buy premium). The yellow
BIG MOVE badge flags |today Δ| ≥ 3%.
Scanned
Spikes
High IV Rank (≥60)
Biggest mover
Highest IV Δ
Results
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