Hindsight Markets / Glossary

Practice pre-market trading and the open

Updated 23 October 2026 · By Hindsight Markets

To practise the pre-market and the open, replay a real past morning from 4:00 a.m. ET, watch the gappers form on a scanner as volume comes in, and trade the 9:30 bell against the same order book traders had. The pre-market is thin and the open is the busiest stretch of the day, so both reward practice on days that really moved.

What is different before 9:30

• A thinner book. Fewer orders rest at each price, so spreads are wider and a market order can travel. See bid-ask spread.
• No LULD bands. The bands run only from 9:30 a.m. to 4:00 p.m. ET, so a pre-market move has no LULD pause. Other halts can still happen.
• Orders need the session. An order that is only good for the regular session does not work before the bell. See why your limit order didn't fill.
• The price can mislead. A pre-market high on light volume can be far from where the stock opens.

More on the session itself is on pre-market.

A pre-market run: OLOX on 21 October 2026

OLOX barely traded before 6:24 a.m. Then it went from about 0.76 to 0.93 by 6:30. With a float of 1.42 million shares, its volume since 4:00 a.m. passed the float at 6:38 a.m., twice by 6:54 and three times by 7:01. It crossed 1.00 at 7:12 a.m. and made the high of the day, 1.35, in the 8:00 minute. At 8:36 a.m. buyers took 115,532 shares at 1.18 in 2.7 seconds, through an offer that had peaked at 165,131 shares.

By the bell, 35.32 million shares had traded, 68% of the day's volume to 8:00 p.m. It opened at 1.24, up 67.0%, below its pre-market high, and closed at 0.9971. Most of OLOX's day was over before 9:30. The full day is on the OLOX runner page.

An open that went the other way: POM on 21 October 2026

POM was halted from 3:04 a.m. and first traded at 3.55 at 9:00 a.m., against a previous close of 1.99. The slide began the next minute. It opened at 0.9501 at 9:30, down 52.4%, and was at 0.69 by its first LULD pause at 9:35. Only 878,638 shares traded before the open. The pre-market price was set on little volume and did not hold. The day is on the POM runner page.

How to practise the morning

1. Start early. Open the day at 4:00 a.m., or at the time you would really sit down, and run a gappers or low-float scan.
2. Build a watchlist before the bell. Note the float, the news and the relative volume of each name, the way you would on a live morning.
3. Plan the open. Decide what you would do if a stock opens above or below its pre-market high, before it does.
4. Slow down at the bell. Run the minutes around 9:30 at half speed, then speed through the quiet stretch after.
5. Review and repeat. Go back to 9:25 and take the open again until the decision is quick.

A replay can start at 4:00 a.m., at 9:30, or at any time you type, up to 7:59 p.m. ET, and runs from half speed to ten times speed. See gap and go for the classic morning setup.