Unusual Call Activity

As of April 21, 2026 (end-of-day snapshot). Pages update daily after the market close.

Names with outsized call-side volume relative to call open interest. A measure of fresh call-side positioning — typically bullish speculation, covered-call writing, or short-put hedging. Not a "sweep" detector: we have daily aggregates, not trade-level aggressor data.

Top 50 by Call Vol/OI

The live unusual-call-activity leaderboard loads after the page hydrates. Rows are ranked by call_volume / call_oi ratio with minimum volume and OI liquidity floors. Aggregate daily data only — not aggressor-tagged.

Methodology

Ranked by call_volume / call_oi descending. Filters: call_volume ≥ 5,000, call_oi ≥ 10,000, spot ≥ $5. Single-session read.

Frequently Asked Questions

Is this the same as unusual-activity?

Different. The existing unusual-activity ranks by aggregate volume/OI regardless of side. This isolates the call side — adding directional nuance. Total unusual activity can be driven by either call or put buying; this screener surfaces which.

Why not "sweeps"?

Sweep detection requires trade-level data. We have daily aggregates. Calling these "sweeps" would imply detection of institutional aggressor flow — which we do not do.

What does high call Vol/OI mean?

Today's call volume is large relative to accumulated positioning. Could be fresh buying, covered-call selling, or unwinds. Interpretation requires looking at spot behavior and skew change alongside.

Can this miss real flow on large-OI names?

Yes — big-OI names show low Vol/OI even on heavy-volume days. Pair with most-active-options for absolute volume.