Toby Crabel
Opening range breakout: the trade that is fully defined by 10:00 am
The first half hour of a session is where overnight orders, news reactions and opening auctions collide, and the range they leave behind is the day's first verdict. This system trades the break of that verdict: by 10:00 am the trigger, the stop and the risk per share are all known, before a single share is bought. Crabel published the statistics in 1990 and added the finding that still defines the method — the edge is strongest after quiet, narrow-range days.
- Style
- Breakout
- Approach
- Mechanical
- Difficulty
- Intermediate
- Horizon
- Intraday
- Holding period
- Minutes to hours (never overnight)
- Time needed
- The first half of the session
- Markets
- Index ETFs · Index futures · Liquid large caps
The rule set
- Mark the high and low of the first 30 minutes of the session
- Entry: buy when price closes above the opening-range high
- Failure: exit if price closes back below the opening-range low
- Never hold overnight — the trade is closed by the end of the session
- Crabel's edge was strongest after narrow-range days (NR7): quiet days load the spring
What makes it distinctive
- The oldest and best-documented day-trading system — Crabel published the statistics in 1990, decades before the method became a social-media staple
- Everything is defined by 10:00 am: the range, the trigger, and the failure level, all before any position exists
- The opening range low doubles as the stop, so the risk per share is known before entry rather than discovered after it
When it works
Sessions that trend after the open — gap days, news days, and anything following a quiet narrow-range day, where the break of the opening range is the start of the move rather than the end of it.
When it fails
Rangebound sessions produce breakout after breakout that immediately fails back into the range. Wide opening ranges make the stop distance so large that one loss erases several wins.
How a decision moves through it
Input
Fifteen-minute intraday bars
The published implementation runs on 15-minute bars, so the opening range is simply the first two bars of each session — no separate clock needed.
Measure
Opening range: the high and low of the first 30 minutes
The range does not exist until it is complete. Nothing downstream can fire inside the opening window itself, because there is no level to break until 10:00.
Decide
A close above the opening-range high
The trigger is a bar closing beyond the range, not the first tick through it — a deliberately stricter read that trades a later entry for fewer one-tick fakeouts.
Act
Buy the breakout
One position, taken in the direction the session broke. The trade's entire thesis is that the opening verdict extends into a trend day.
Size & protect
Exit on a close back below the range low
Crabel's stop lives at the opposite side of the opening range: a session that traverses the whole range backwards has not paused — the breakout has failed.
Size & protect
Same-day close, with a 1% disaster stop
The range-failure exit confirms on a bar's close, so a hard stop of about 1% caps the damage when a bar gaps straight through the range. Nothing is ever held overnight.
Why the first thirty minutes mean more than any other thirty
Everything that accumulated overnight — earnings reactions, macro news, foreign sessions, orders queued before the open — gets priced in the first half hour. The high and low that period leaves behind are not arbitrary lines: they are the boundaries of the market's first attempt at agreeing what today is worth.
A later break of that range is therefore information. The market processed the overnight news, set a value area, and then left it — which is what the start of a trend day looks like from inside the session.
That is the entire thesis, and it is honest about what it is not: the system does not predict which days will trend. It positions for the extension once the opening verdict breaks, and it pays a known, pre-defined price on the days when the break was false.
By 10:00 the whole trade is on paper
Most systems in this library discover their risk as the trade develops. This one does not. Once the opening range is complete, the entry level is the range high, the failure level is the range low, and the distance between them — the risk per share — is a number you can read off the chart before deciding anything.
- The trigger is known: a close above the opening-range high.
- The stop is known: a close back below the range low, with a hard 1% backstop for gaps.
- The risk is known: roughly the width of the range, per share, before entry.
- The deadline is known: the position dies at the close whatever else happens.
Knowing the risk before entry is what makes the sizing page of this dossier unusually short on judgement: the range width is measured, the risk budget is divided by it, and the position size falls out as arithmetic.
Crabel's real finding: quiet days load the spring
The lasting contribution of Crabel's 1990 book is not the breakout itself — it is the conditioning. He measured what happened after narrow-range days, in particular NR7: a day whose range is the narrowest of the last seven. Breakouts following those quiet days ran further and failed less.
The mechanism is contraction and release. A narrow day means the market has coiled — disagreement has compressed into a tight band — and the next directional move meets little structure in its way. An opening-range break after such a day is a spring releasing, not a random lurch.
Five ways into this system
- The range, the break, and the failure level on the other sideFour levels and a clock: the range high, the range low, a 1% backstop, and a session that ends the trade whatever the chart says.7 min read
- The range width is the risk: sizing falls out as divisionOne number — the width of the opening range — prices the whole trade, and the mornings when that number is large are the mornings to pass.6 min read
- A real opening bell, liquid mornings, and a trade that ends at fourThe system needs a market with a real open, an instrument liquid enough to fill at the break, and a trader present for the morning — the afternoon asks much less.5 min read
- The rangebound day: breakouts that fail back, one after anotherMost sessions do not trend, so most raw breakouts fail — the system's survival depends on losing those small, filtering the worst days out, and never carrying the argument overnight.6 min read
- ORB for beginners: the morning's verdict, and the bet that it extendsOne of the few day-trading systems a beginner can fully specify on one index card — which is exactly why it teaches the right first lessons.6 min read
The ideas behind it
This system assumes you already know these. Each one is explained from scratch in Investing 101.
Compare with
- NR7 Narrow-Range BreakoutFind the bar with the narrowest high-to-low range of the last seven, then buy a break above that bar's high on the following session.
- 9/20 EMA + VWAP MomentumWhile price holds above the session VWAP, buy when the 9 EMA crosses above the 20 EMA, exit when the cross reverses, and end every day flat.
These are documented methods described for study. Nothing here is investment advice, a recommendation, or a claim about future returns — every system on this page has losing periods, and the pages say where.
Reading about a system is not having one.
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