Gapped up at the open (3%+) (UK)
A technical stock screen computed nightly from daily-close price history (market data). Selection is deterministic — a company appears only when its stored indicator meets the screen's rule; nothing is estimated.
12 companies in the catalog currently match this technical screen. Leading the list, Atalaya Mining (ATYM.L) is opened 6.5% above the previous session's close (previous close 8.79), and had not traded back through it by the close.
| # | Company | Sector | Price | Signal |
|---|---|---|---|---|
| 1 | Atalaya Mining (ATYM.L) | — | £9.60 | opened 6.5% above the previous session's close (previous close 8.79), and had not traded back through it by the close |
| 2 | discoverIE (DSCV.L) | — | £8.23 | opened 4.9% above the previous session's close (previous close 7.99), and had not traded back through it by the close |
| 3 | 4imprint (FOUR.L) | — | £48.90 | opened 4.7% above the previous session's close (previous close 43.9), and had not traded back through it by the close |
| 4 | Raspberry Pi Holdings (RPI.L) | — | £6.94 | opened 4.6% above the previous session's close (previous close 6.75), though it traded back through that level before the close |
| 5 | Volution Group (FAN.L) | — | £6.89 | opened 4.3% above the previous session's close (previous close 6.92), though it traded back through that level before the close |
| 6 | Chesnara (CSN.L) | — | £3.42 | opened 3.7% above the previous session's close (previous close 3.4), and had not traded back through it by the close |
| 7 | Next plc (NXT.L) | — | £156.60 | opened 3.7% above the previous session's close (previous close 148.1), and had not traded back through it by the close |
| 8 | Playtech (PTEC.L) | — | £3.66 | opened 3.6% above the previous session's close (previous close 3.75), though it traded back through that level before the close |
| 9 | Glencore (GLEN.L) | — | £5.73 | opened 3.5% above the previous session's close (previous close 5.51), and had not traded back through it by the close |
| 10 | Hochschild Mining (HOC.L) | — | £4.80 | opened 3.2% above the previous session's close (previous close 4.51), and had not traded back through it by the close |
| 11 | Fresnillo plc (FRES.L) | — | £27.47 | opened 3.2% above the previous session's close (previous close 26.29), and had not traded back through it by the close |
| 12 | Trustpilot (TRST.L) | — | £2.93 | opened 3.0% above the previous session's close (previous close 2.8), though it traded back through that level before the close |
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What is a gap up?
A "gap" is the part of a move that happens while the market is shut. The overnight gap is simply the opening price measured against the previous session's closing price: if a company closes at 100 and opens at 105, it gapped up 5%, and no trade happened anywhere in between. Gaps are usually the market repricing something that was announced out of hours — results, a trial readout, a bid — which is why they cluster around earnings dates rather than appearing at random.
How do I read the Gapped up at the open (3%+) (UK) screen?
This screen lists companies whose most recent session opened at least 3% above the previous close, largest gap first, and says whether price traded back down through that previous close before the session ended. That second fact matters more than it looks: measured across our catalog, about a third of gaps of 2% or more are closed again during the very session that opened them. A gap describes a session that has already opened. It is not a signal, it says nothing about the next session, and nothing here is advice.
New to this? What is Price gaps (gap up, gap down, and filling a gap)? →
Data: daily-close price history, recomputed nightly. Every figure is shown with its as-of date on the company page; a company without enough price history for this indicator is excluded, never estimated.
2 covered companies were not evaluated for this screen because their price series end on or before an earlier session (AEP.L, MEGP.L), at least 0 trading sessions behind the null session the rest of the catalog carries. A technical signal is a claim about the present, so it is not asserted from a series that stops before it. Those companies keep the readings they have on their own page, with the as-of date they were computed from.
Last updated 2026-08-05 — this screen recomputes nightly from daily-close prices, so its members change over time.
Informational only — NOT financial advice. Technical indicators describe past price behavior; they are not predictions. All figures are delayed daily-close data.