Put/Call Volume Ratio
Put/call volume ratio.
What it measures
The ratio of put volume to call volume traded on Deribit: put_vol / call_vol. A classic options-sentiment gauge: a rising ratio means traders are paying for downside relative to upside, whether for hedging or for directional bets. Like most sentiment ratios it is most informative at extremes and in changes rather than in its absolute level — which is what the z-score and percentile-rank transforms are for.
References: Tier-2 sentiment Deribit.
Point-in-time, leak-free
Like every QUANT_API feature, options.pcr_volume is computed point-in-time: each value uses only data that had actually arrived at the timestamp you query — live or historical. No restatements, no backfills that quietly rewrite the past, no look-ahead. The value your backtest sees at a given stamp is the value the live API would have returned at that stamp. How we enforce this is documented on the methodology page.
Windows & transforms
The signal is computed over rolling windows; each window can be served raw or through a transform (z-score, percentile rank, delta…). Which windows and transforms you can query depends on your plan — the signal itself supports:
Plan & access
options.pcr_volume unlocks on the Edge plan ($499/mo) and every plan above it. Every new account starts with a 14-day free trial of the Signal plan — no card required. The trial covers Signal-plan features, so you can evaluate the API end-to-end before upgrading to Edge.
Example call
Resolve the latest value for BTC (5m window, zscore transform — both available on the Edge plan):
curl -G https://api.quant-api.dev/v1/features/live \
-H "Authorization: Bearer fk_live_<your_key>" \
--data-urlencode "asset=BTC" \
--data-urlencode "features=options.pcr_volume@5m:zscore"Same key works on /v1/features/historical for point-in-time backtesting — see the API docs.