1 The Edge — why it works
The opening range sets the day's tone
The first minutes of trading are the session's most violent price discovery. The opening range — the high and low of the first 5, 15, or 30 minutes — captures that battle. A decisive break of it signals the day's directional intent, especially with volume and trend behind it.
2 Where it works — and doesn't
Trend days, not chop days
Works best when…
- A clean, contained opening range then a decisive break.
- Strong relative volume on the break.
- Break aligns with the daily trend or the gap direction.
Fails / avoid when…
- Choppy range days — both sides break and fail.
- Thin volume — the break has no fuel.
- A huge opening range that leaves no room to a target.
3 Setup checklist
All true before you act
- ✓Define the range. Mark the high/low of the first 5 / 15 / 30 minutes — pick one and be consistent.
- ✓Decisive break. Price breaks the range on momentum, ideally with rising volume / RVOL.
- ✓Trend alignment. The break agrees with the daily trend or gap.
- ✓Retest (preferred). The break holds on a pullback to the range edge.
4 The process
Break, retest, manage
Entry
On the break of the opening-range high (long) or low (short) — ideally on a successful retest of that edge.
Stop (1R)
On the opposite side of the opening range (or its midpoint for a tighter stop). Entry − stop = 1R.
Position size
Risk a small fixed % of the account; shares = risk ÷ 1R.
Exit & management
Target a multiple of the range height (e.g., 1–2×) or the next key level; trail the runner with ATR or VWAP.
5 Worked example (illustrative)
In R
| Account / risk | $25,000 · 1% = $250 |
| Opening range | $99.50 – $101.00 (height $1.50) |
| Entry (break of high) | $101.10 |
| Stop (below range) — 1R | $99.40 · 1R = $1.70 |
| Size = $250 ÷ $1.70 | ≈ 147 shares |
| Target (+1.5× range), +1.3R | $103.35 · +$330 |
| If stopped: −1R | − $250 |
6 Honest expectancy
Selectivity beats the false breakout
ORB is a well-known framework, but its results vary enormously by market, session, and filters — and its main drag is the false breakout, where price pokes through the range and reverses. The edge, where it exists, comes from selectivity (volume, trend alignment, the retest) and disciplined risk, not from trading every break.
An expectation, never a guarantee.
7 Make it yours
Test before you trade
A no-risk validation routine
In replay, test the 5- vs 15- vs 30-minute range on your market. Compare taking every break vs requiring rising volume and a retest. Measure how much each filter cuts false breakouts — in R.
8 Common mistakes
How traders blow this up
- Trading every break. Most ranges produce at least one false break.
- No volume filter. A break on thin volume usually fails.
- Chasing. Entering far above the range instead of on a retest.
- Stop inside the noise. A stop too tight gets tagged by normal wiggle.