Call Wall
A strike above the current price with a heavy concentration of call open interest, where rallies have tended to stall. Read as a soft resistance or stall zone, not a hard line.
TL;DR: The call wall is a strike above spot stacked with call open interest, where rallies tend to stall — a soft resistance zone, not a bounce line.
The level is a big open interest cluster: as price climbs toward it, advances have tended to slow. Hedging flow around the cluster is the conventional explanation, but open interest is unsigned — we cannot see who holds which side, so treat the mechanism as interpretation and the level as the measurement.
The honest caveat: in backtests since 2012, mechanically shorting the call wall is roughly a coin-flip — rallies punch through it often enough that it's not a reliable short trigger. Treat it as context (a reason to tighten expectations, trim, or anchor a covered-call strike), not a signal to fade. Its usefulness varies by ticker. More: Call Wall & Put Wall: Options Support and Resistance.
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