{"slug":"overnight-trading-order-types","qid":"hourly_spread","label":"AAPL quoted spread and top-of-book size by ET hour, September 15, 2026","post_title":"Overnight Trading Order Types: Limit Only","post_url":"/blog/overnight-trading-order-types#q-hourly_spread","columns":["et_hour","spread_cents","quote_size"],"rows":[{"et_hour":"04:00","spread_cents":24.53,"quote_size":125},{"et_hour":"05:00","spread_cents":19.62,"quote_size":167},{"et_hour":"06:00","spread_cents":23.8,"quote_size":159},{"et_hour":"07:00","spread_cents":17.83,"quote_size":117},{"et_hour":"08:00","spread_cents":17.41,"quote_size":109},{"et_hour":"09:00","spread_cents":6.7,"quote_size":104},{"et_hour":"10:00","spread_cents":4.02,"quote_size":108},{"et_hour":"11:00","spread_cents":3.23,"quote_size":89},{"et_hour":"12:00","spread_cents":2.68,"quote_size":95},{"et_hour":"13:00","spread_cents":2.29,"quote_size":111},{"et_hour":"14:00","spread_cents":2.03,"quote_size":100},{"et_hour":"15:00","spread_cents":2.15,"quote_size":196},{"et_hour":"16:00","spread_cents":14.8,"quote_size":251},{"et_hour":"17:00","spread_cents":10.75,"quote_size":259},{"et_hour":"18:00","spread_cents":12.85,"quote_size":192},{"et_hour":"19:00","spread_cents":10.32,"quote_size":388}],"shape":"ranking","sql":"SELECT\n    formatDateTime(toTimeZone(sip_timestamp, 'America/New_York'), '%H:00') AS et_hour,\n    round(avg(toFloat64(ask_price) - toFloat64(bid_price)) * 100, 2)       AS spread_cents,\n    round(avg(toFloat64(bid_size + ask_size)) / 2, 0)                      AS quote_size\nFROM global_markets.cache_stocks_quotes\nWHERE ticker = 'AAPL'\n  AND sip_timestamp >= '2026-09-15 04:00:00'\n  AND sip_timestamp <  '2026-09-16 04:00:00'\n  AND ask_price > bid_price\n  AND bid_price > 0\nGROUP BY et_hour\nORDER BY et_hour","computed_at":"2026-09-27T15:02:51.581899+00:00","elapsed":0.002996162}