Relative-volume bars for a contract
Same shape as /v1/underlying/{ticker}/rvol but scoped to a
single contract.
Authorizations
Skylit API key in the Authorization header
(Authorization: Bearer fs_live_<key>). X-API-Key is also accepted.
Path Parameters
OPRA option symbol in URL-safe form:
{ticker}__{YYMMDD}{C|P}{strike×1000, 8 digits} — the ticker and the
15-character contract block are joined by a double underscore
(__). For example, an AAPL $250 call expiring 2026-01-17 is
AAPL__260117C00250000. (A space-padded 21-char OCC form such as
AAPL 260117C00250000 is also accepted on some endpoints, but the
__ form is canonical and works across all contract routes.)
"SPY__250516C00580000"
Query Parameters
Trailing window — {N}D where N is 1–365.
"1D"
1min, 5min, 10min, 15min, 30min, 1d, 1w Baseline lookback as {N}d (e.g. 14d). Max 365 days.
Trading date the request targets, in YYYY-MM-DD. Defaults to the
current trading date (the most recent session that has settled
enough data to be queryable). Past dates fall through to the daily
rollup tables.
"2026-05-27"
rvol, volume, premium, time Sort direction. Defaults to asc when order_by=time, otherwise desc.
asc, desc x >= 1full, summary 
