BTC Options Put/Call Ratio — Deribit
LockedSum(Put OI) / Sum(Call OI) for Bitcoin options. <1 = bullish skew.
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What this chart shows
Methodology
Daily ratio of summed put OI to summed call OI across all Deribit BTC option instruments. Snapshot accumulating via daily cron. Stored as integer × 10000; frontend divides.