Relative Volume Screener in SQL: Free API
Build a relative volume screener in SQL, with the time of day correction the RVOL formula needs, one curl call, no API key, and a ranked top 20 list.
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Covered Call Screener: Build One in SQL
Build a covered call screener in SQL: rank a whole option chain by annualised premium yield inside a delta band, then replay the screen on past dates.