Hindsight Markets Recaps Small-cap stocks on October 28, 2026
GCTK, October 28: a run to $2.50
GCTK opened up 17%, ran to $2.50, then gave back most of the run by the close.
What happened
Before the open
We found no news or filing before the move. Before the bell it reached $2.35, on 5.3M shares.
The open
It opened up 17%, at $2.00. It ran to $2.50 by 9:40 a.m.
The close
It closed at $2.03, 19% under its high.
What to take from it: The high came early. Most of the run was gone by the close, so the move was in the morning, not the hold.
The details
How it traded, step by step
Gap, run, gave some back. It gapped up 17.0% to $2.00 at the open, ran from the open to the high of $2.50 in 10 minutes, then gave back 94% of that move by 4:00 p.m., trading at $2.03, still above the open.
| Time (ET) | What happened |
|---|---|
| 7:01 a.m. | First trade 20% above the previous close of $1.71 |
| 7:10 a.m. | Volume since 4:00 a.m. passes the whole float, 1.16 million shares |
| 8:22 a.m. | Pre-market high, $2.35 |
| 9:30 a.m. | The open: $2.00, up 17.0% from the previous close |
| 9:40 a.m. | High of the day to the close, $2.50 |
| 3:59 p.m. | Last trade before the 4:00 p.m. close, $2.03, 18.8% below the high |
The shape's name comes from a fixed rule, not a judgement (how shapes are named). Halts are in the halt table below.
The day in numbers
- Previous close
- $1.71
- Open, 9:30 a.m.
- $2.00
- Gap at the open
- +17.0%
- Pre-market high
- $2.35 at 8:22 a.m.
- High, 4 a.m. to 4 p.m.
- $2.50 at 9:40 a.m.
- Low, 4 a.m. to 4 p.m.
- $1.63
- Close, 4 p.m.
- $2.03
- Change at 4 p.m.
- +18.7%
- After-hours high, 4 p.m. to 8 p.m.
- $2.15 at 5:53 p.m.
- Volume, 4 a.m. to 4 p.m.
- 9.90 million
- Volume after hours, 4 p.m. to 8 p.m.
- 214,797
- Relative volume by 8 p.m.
- 15.8×
- Float
- 1.16 million shares, from filings as of October 28, 2026
- Shares outstanding
- 1.18 million
- Volume, from the one-minute bars: 5.33 million shares before the 9:30 a.m. open (53%), 2.92 million in the first 30 minutes (29%), and 1.85 million in the rest of the day to 8 p.m. (18%).
- Float rotation, the volume since 4 a.m. against the float of 1.16 million shares: past it once at 7:10 a.m., twice at 7:21 a.m., three times at 7:30 a.m.
- Other days GCTK met the small-cap rule in our recaps: 3, the latest on October 26, 2026.
On the day's lists: the gainers, intraday runners. It is here because it met the small-cap rule on the gainers: price $2 to $20, up 10% or more, relative volume 5× or more, float under 20 million shares, its high reached $1 or more and it started the day at $20 or under (the rule every page uses).
Halts (none)
The exchange's halt feed shows no halts for GCTK that day.
Halt bands that day: the LULD plan's Amendment 18 rules (what that means, LULD calculator).
How we read the data, name a day's shape and pick the stocks: methodology.
Trade this day
Replay GCTK on October 28, 2026 in Hindsight Markets: the real tape, the order book and the halts, on a clock you control, and see where your orders would have filled.