// 01 What is the Opening Range Breakout?
NSE opens at 9:15 AM. The first 15–30 minutes are typically the most volatile — overnight global cues, institutional orders, and retail activity all converge. This creates an opening range — a high and a low for that initial period.
Once the opening range is established, the market tends to break out in one direction. The ORB strategy captures this: buy when price breaks above the range high, or short when price breaks below the range low.
// 02 ORB Entry and Exit Rules
Step 1: Record the High and Low of 9:15–9:30 AM (15-minute ORB).
Step 2 — BUY signal: Price closes above the ORB High. Enter at the breakout candle close.
Step 3 — SHORT signal: Price closes below the ORB Low. Enter short at the breakout candle close.
Stop Loss (BUY): Place stop at the ORB Low — if price comes back down through the range, the breakout has failed.
Target: ORB High + (ORB High − ORB Low) × 1.5 — i.e. 1.5× the range size above the breakout. This gives a natural 1.5:1 risk-reward minimum.
Exit time: Always exit by 3:00 PM regardless of position status — avoid holding into the wild closing auction.
// 03 Which ORB Time Window to Use?
- 5-minute ORB (9:15–9:20): Very narrow range, many false breakouts. Only for highly liquid futures like BankNifty.
- 15-minute ORB (9:15–9:30): The most popular. Good balance of range quality and trade frequency.
- 30-minute ORB (9:15–9:45): Fewer trades but higher quality breakouts. Best for equity stocks.
MyAlgoKart's breakout backtester supports all three window sizes — test which performs best for your chosen symbol.
// 04 Best NSE Instruments for ORB
ORB works best on instruments with strong directional momentum after open:
- BankNifty futures — best ORB results on expiry Wednesdays
- Nifty futures — strong ORB on earnings season and expiry Tuesdays
- High-beta stocks — TATAMOTORS, ADANIPORTS, TATASTEEL — large ranges, strong breakouts
- Individual stocks on result day — ORB works exceptionally well when a stock has just announced earnings
// 05 Backtesting ORB on MyAlgoKart
MyAlgoKart's dedicated Breakout backtester includes the ORB strategy with configurable opening range window. Select your symbol, set the ORB window (15 or 30 minutes), set your stop and target in rupees, and run over 60–90 days of NSE data.
A good ORB backtest on BankNifty typically shows 40–55% win rate with a profit factor of 1.4–2.0, driven by a few large winning trades on strong breakout days.