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Castle Biosciences CSTL 34.99 -0.35 -0.99%

CSTL Options Support & Resistance

CSTL (Castle Biosciences): Explore options-derived support and resistance levels, call walls and put walls. Free delayed preview.

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ATM IV
0.498
Put Call Ratio (OI)
0.221
Put Call Ratio (Vol)
0.825
IV Rank
16.7
IV Percentile
9.3
Max Pain
20

Option Walls

A gamma wall is a strike where dealer gamma is concentrated.

Price often pauses or reverses there because dealers must hedge aggressively when the underlying crosses it. Walls above spot tend to act as resistance; walls below spot tend to act as support.

See also: Gamma exposure (GEX)

$15 Key Put Strike 2 $20 Put Wall $25 Key Put Strike 3 $30 Key Call Strike 3 $35 Key Call Strike 2 $40 Call Wall