{"slug":"order-modification-and-queue-priority","qid":"drain_rate","label":"How fast the tape drains a queue, by time of day (AAPL, June 2026)","post_title":"Does Modifying an Order Lose Queue Priority?","post_url":"/blog/order-modification-and-queue-priority#q-drain_rate","columns":["et_time","avg_k_shares_per_min","median_k_shares_per_min"],"rows":[{"et_time":"09:30","avg_k_shares_per_min":290.6,"median_k_shares_per_min":182.8},{"et_time":"09:45","avg_k_shares_per_min":149.5,"median_k_shares_per_min":119.9},{"et_time":"10:00","avg_k_shares_per_min":137.4,"median_k_shares_per_min":109.2},{"et_time":"10:15","avg_k_shares_per_min":112.1,"median_k_shares_per_min":89.8},{"et_time":"10:30","avg_k_shares_per_min":107.7,"median_k_shares_per_min":87.7},{"et_time":"10:45","avg_k_shares_per_min":103.4,"median_k_shares_per_min":82.6},{"et_time":"11:00","avg_k_shares_per_min":89.2,"median_k_shares_per_min":76.7},{"et_time":"11:15","avg_k_shares_per_min":85.2,"median_k_shares_per_min":69.6},{"et_time":"11:30","avg_k_shares_per_min":97.5,"median_k_shares_per_min":78.8},{"et_time":"11:45","avg_k_shares_per_min":82.3,"median_k_shares_per_min":63.8},{"et_time":"12:00","avg_k_shares_per_min":84.6,"median_k_shares_per_min":62},{"et_time":"12:15","avg_k_shares_per_min":85,"median_k_shares_per_min":52.9},{"et_time":"12:30","avg_k_shares_per_min":84.1,"median_k_shares_per_min":57.3},{"et_time":"12:45","avg_k_shares_per_min":81.7,"median_k_shares_per_min":61.2},{"et_time":"13:00","avg_k_shares_per_min":80.4,"median_k_shares_per_min":57.1},{"et_time":"13:15","avg_k_shares_per_min":78.5,"median_k_shares_per_min":54.2},{"et_time":"13:30","avg_k_shares_per_min":83.1,"median_k_shares_per_min":58.1},{"et_time":"13:45","avg_k_shares_per_min":80.1,"median_k_shares_per_min":54.5},{"et_time":"14:00","avg_k_shares_per_min":85.1,"median_k_shares_per_min":58.2},{"et_time":"14:15","avg_k_shares_per_min":72.1,"median_k_shares_per_min":51.9},{"et_time":"14:30","avg_k_shares_per_min":80,"median_k_shares_per_min":59.8},{"et_time":"14:45","avg_k_shares_per_min":83.4,"median_k_shares_per_min":59.7},{"et_time":"15:00","avg_k_shares_per_min":89.1,"median_k_shares_per_min":70.8},{"et_time":"15:15","avg_k_shares_per_min":103.2,"median_k_shares_per_min":77.3},{"et_time":"15:30","avg_k_shares_per_min":121.6,"median_k_shares_per_min":94.4},{"et_time":"15:45","avg_k_shares_per_min":358,"median_k_shares_per_min":220.9}],"shape":"series","sql":"SELECT\n    formatDateTime(toStartOfFifteenMinutes(et), '%H:%i')                    AS et_time,\n    round(toFloat64(avg(volume)) / 1000, 1)                                 AS avg_k_shares_per_min,\n    round(quantileDeterministic(0.5)(toFloat64(volume),\n                                     toUInt64(toUnixTimestamp(et))) / 1000, 1) AS median_k_shares_per_min\nFROM\n(\n    SELECT\n        toTimeZone(window_start, 'America/New_York') AS et,\n        volume\n    FROM global_markets.delayed_stocks_minute_aggs\n    WHERE ticker = 'AAPL'\n      AND window_start >= '2026-06-01'\n      AND window_start <  '2026-07-01'\n      AND (toHour(toTimeZone(window_start, 'America/New_York')) * 60\n           + toMinute(toTimeZone(window_start, 'America/New_York'))) >= 570\n      AND (toHour(toTimeZone(window_start, 'America/New_York')) * 60\n           + toMinute(toTimeZone(window_start, 'America/New_York'))) < 960\n)\nGROUP BY et_time\nORDER BY et_time","computed_at":"2026-08-14T16:06:38.262713+00:00","elapsed":0.002958322}