Master Opening Range Breakout (ORB)

WHY does ORB work? (First principles)

The whole edge is: let the market show its hand first, then follow the winner.

HOW to build the strategy (Derivation from scratch)

We don't dump rules — we derive each one.

Step 1 — Define the range height

$R = OR_{\text{high}} - OR_{\text{low}}$ Why this step? $R$ measures the volatility of the opening fight. A wide $R$ = big battle; a narrow $R$ = coiled spring ready to release.

Step 2 — Entry

Enter long at $OR_{\text{high}}$ (or a tick above, on a confirmed candle close). Why this step? We need proof of a breakout, not a fake poke. A candle close above filters out noise wicks.

Place the stop just past the opposite side, or at half the range: $SL_{\text{long}} = OR_{\text{low}} \quad(\text{tight: } OR_{\text{high}} - \tfrac{R}{2})$ Why this step? If price re-enters the range, the breakout failed by definition — the thesis is invalidated, so exit.

Step 4 — Target via Risk:Reward

Define risk $= E - SL$ where $E$ is entry. Choose reward multiple $k$ : $\text{Target} = E + k\,(E - SL)$ Why this step? We size the target relative to risk so that even with a low win rate we stay profitable. Expectancy governs survival, not any single trade.

Step 5 — Expectancy check (the real edge)

$\mathbb{E}[\text{trade}] = p\cdot R_{\text{win}} - (1-p)\cdot R_{\text{loss}}$ where $p$ = win probability, $R_{\text{win}}$ = avg profit, $R_{\text{loss}}$ = avg loss. Why this step? A strategy is only worth trading if $\mathbb{E}[\text{trade}] > 0$ . With a 1:2 R:R and risk = 1 unit, breakeven win rate is where $p\cdot2 = (1-p)\cdot1 \Rightarrow p = \tfrac13$ .

Figure — Master Opening Range Breakout (ORB)

Worked Examples

Common Mistakes (Steel-manned)

Active Recall

Recall What defines the Opening Range?

The high and low of the first $N$ minutes (5/15/30) after the open.

Recall Why do we wait for a candle CLOSE instead of a touch?

To filter out wick/liquidity-grab noise; a close proves buyers absorbed all sellers.

Recall Breakeven win rate for 1:3 R:R?

$p_{\text{be}}=\frac{1}{1+3}=25\%$ .

Recall What invalidates a long ORB?

Price re-entering the range (falling back below the OR high / to your stop).

Recall Prefer wide or narrow opening range for entries? Why?

Narrow: tighter stop, better R:R, coiled-spring energy.

Recall (Feynman, explain to a 12-year-old)

Imagine kids playing tug-of-war in a small square painted on the ground. As long as the rope-knot stays inside the square, nobody's really winning. The MOMENT the knot is dragged outside the square, one team clearly won and the other gets pulled hard behind them — they keep sliding. In trading, the square is the opening range, and "sliding" is the price trend. We wait for the knot to leave the square, then bet on the winning team.

Connections

Support and Resistance — the OR high/low ARE intraday S/R levels.
Volatility and ATR — range height $R$ is a micro-volatility measure.
Risk-Reward and Position Sizing — expectancy $\mathbb{E}=pk-(1-p)$ drives ORB survival.
Volume Confirmation — real breakouts show rising volume.
Breakout Trading — ORB is the intraday special case.
Stop-Loss Placement — opposite side of range.

What is the Opening Range (OR)?

The interval between the highest high and lowest low of the first N minutes (5/15/30) after market open.

What triggers a long ORB entry?

A candle closing above the OR high.

What triggers a short ORB entry?

A candle closing below the OR low.

Why wait for a candle close, not a touch?

To avoid wick/liquidity-grab fakeouts; a close proves genuine absorption of the opposite side.

Formula for range height R?

R = OR_high − OR_low.

Where do you place the stop-loss for a long ORB?

At the OR low (opposite side) or a tighter OR_high − R/2.

Target formula given entry E, stop SL, reward multiple k?

Target = E + k·(E − SL).

Expectancy of a trade?

E = p·R_win − (1−p)·R_loss.

Breakeven win rate formula for reward:risk k:1?

p_be = 1/(1+k).

Breakeven win rate at 1:2 R:R?

33.3% (1/3).

Breakeven win rate at 1:3 R:R?

25% (1/4).

What invalidates a long ORB thesis?

Price re-entering the range / hitting the stop.

Wide vs narrow opening range — which is preferable and why?

Narrow — tighter stop, better R:R, coiled-spring energy.

Why does ORB trend after breakout (reflexivity)?

Trapped losers' stop-losses become market orders in the breakout direction, adding fuel.

Why NOT use a 60-min opening window?

Move may already be over; huge range = far stop = poor R:R.

Concept Map

Hinglish (regional understanding)

Intuition Hinglish mein samjho

Dekho, market jab khulta hai to pehle 5-15 minute me sabse zyada shor hota hai — overnight ke orders, news, sabka gussa ek saath fire hota hai. Is time me jo sabse upar (high) aur sabse neeche (low) price banti hai, usko hum Opening Range kehte hain. Yeh ek dabaye hue spring jaisa hai. Jab tak price is box ke andar hai, koi clear winner nahi hai.

ORB ka game simple hai: wait karo, phir winner ke peeche bhaago. Jab price is box ke high ke upar candle close karti hai, matlab buyers ne saare sellers ko kha liya — yeh real demand ka proof hai, sirf opinion nahi. Tab hum long lete hain. Stop-loss box ke doosre side (OR low) pe rakhte hain, kyunki agar price wapas box me aa gayi to breakout fail ho gaya. Target ko hum risk ke hisaab se decide karte hain — 1:2 ya 1:3 R:R.

Sabse important baat — candle close ka wait karo, sirf touch pe mat kudo. Bade players jaanbujh ke wick nikaalte hain taaki tumhare stop trigger ho jaayein aur phir palat jaate hain. Isliye confirmation zaroori hai. Aur ek math yaad rakho: agar reward:risk 1:2 hai to sirf 33% trades jeet ke bhi tum profit me raho ge, kyunki $p_{be} = \frac{1}{1+k}$ . Yeh formula tumhe batata hai ki accha setup dikhne se kaam nahi chalta, numbers ka positive hona zaroori hai.

Chhota mistake bachao: bahut wide range mat chuno (stop door ho jayega, R:R kharab), aur 60 minute ka window mat use karo (move tab tak khatam ho jaata hai). Narrow, coiled range best hota hai — tight stop, bada reward. Bas: WAIT-CLOSE-FOLLOW.

WHY does ORB work? (First principles)

WHAT is the Opening Range?

HOW to build the strategy (Derivation from scratch)

Step 1 — Define the range height

Step 2 — Entry

Step 3 — Stop-loss

Step 4 — Target via Risk:Reward

Step 5 — Expectancy check (the real edge)

Worked Examples

Common Mistakes (Steel-manned)

Active Recall

Connections

Concept Map

Hinglish (regional understanding)

Test yourself — Trading Strategies

Connections