How to scan opening and premarket gaps with ChatGPT or Claude

A starting list for research. It does not recommend any trade.

385 stocks gapped at least 3% at the Nov 6 open; these are the five largest. Last prices were taken late in the morning and kept moving after that. OMH, a small stock that spiked earlier in the week, gave back a quarter of its price at the open.

US stocks, ETFs and futures. The free plan runs 20 queries a day on daily bars; Pro adds intraday.

Paste these into the same chat, after the first answer, so your AI knows which results you mean.

• Which of these filed an earnings release on Form 8-K?

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• Any news on these in the past two days?

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• Chart the top three over the last 60 sessions.

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• Which of these are still above today's open?

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An opening gap is the jump between one session's close and the next session's open, measured in percent. The move from the open to the close shows whether the gap kept going or faded during the day.

The rule Monk.trade uses: common stocks at $5 or more, averaging at least $20M traded a day over the 20 sessions before today. Today's open must be at least 3% above or below yesterday's close. There is no volume test, because early in the day volume covers only part of a session.

• Yesterday's gaps on heavy volume

  “Using Monk.trade, check the last completed daily session for common stocks averaging at least $20M in daily trading value that opened at least 3% above or below the prior close. Require volume of at least 1.5 times the prior 20-day average. Show the prior close, open, close, opening gap and move from the open.”

  Open in ChatGPT ↗Open in Claude ↗

  MonkQL

  from stocks
  let gap = 100 * (open[1] / close[2] - 1)
  include type == "common" and sma(close * volume, 20)[2] >= 20000000
  where abs(gap) >= 3 and volume[1] >= 1.5 * sma(volume, 20)[2]
  show close[2] as prior_close, open[1] as day_open, close[1] as day_close, gap, 100 * (close[1] / open[1] - 1) as from_open, volume[1] / sma(volume, 20)[2] as vol_ratio
  sort abs(gap) desc
  take 5
  

• Upside gaps that closed above the open

  “Using Monk.trade, check the last completed daily session for common stocks averaging at least $20M traded a day that opened at least 3% higher and closed at or above the open. Require volume of at least 1.5 times the preceding average.”

  Open in ChatGPT ↗Open in Claude ↗

  MonkQL

  from stocks
  let gap = 100 * (open[1] / close[2] - 1)
  include type == "common" and sma(close * volume, 20)[2] >= 20000000
  where gap >= 3 and close[1] >= open[1] and volume[1] >= 1.5 * sma(volume, 20)[2]
  show close[2] as prior_close, open[1] as day_open, close[1] as day_close, gap, volume[1] / sma(volume, 20)[2] as vol_ratio
  sort gap desc
  take 5
  

• Premarket gaps before the bell (Pro)

  “Using Monk.trade, scan premarket 5-minute bars for common stocks at least 3% above or below the latest daily close. Require at least $1M in premarket dollar volume.”

  Open in ChatGPT ↗Open in Claude ↗

  MonkQL

  from stocks on 5m premarket
  let gap = 100 * (close / close@daily - 1)
  include type == "common"
  where abs(gap) >= 3 and close * volume@session >= 1000000
  show close, close@daily as prior_close, gap, close * volume@session as premarket_value
  sort abs(gap) desc
  take 5
  

• Nothing on this page is a signal to buy or sell. Prices can keep moving against you, and you can lose money.
• The gap is set once the market opens at 9:30 ET, but the last price and the move from the open keep changing until the close. To see whether gaps held, ask for yesterday's gaps on the last completed session (the first variation).
• Daily bars adjust for recorded share splits but not for cash dividends. A regular or special dividend can cause a gap down on the day the stock starts trading without it; check filings or news before reading much into it.
• Premarket trading has fewer shares changing hands and wider gaps between buy and sell prices than the regular session. Premarket scans require Monk.trade Pro.
• Check the reason for a gap. Earnings, share offerings, regulatory news and takeover bids can all cause large moves, and a takeover bid can also cap further gains.