ORB Strategy

The ORB (opening range breakout) strategy is an intraday trading method that marks the high and low of the market’s first minutes — commonly the first 15 or 30 minutes — and enters in the direction of a breakout beyond that range. The logic: the opening range absorbs overnight news and early order flow, and a decisive break of it often marks the day’s direction. On NSE, that means marking the 9:15–9:30 am (or 9:15–9:45 am) high and low, then trading the break.

Example

NIFTY’s first 15 minutes print a high of 25,080 and a low of 25,010 — a 70-point opening range. The rules: buy a break above 25,080 with a stop at the range low; short a break below 25,010 with a stop at the range high; target 1× the range (70 points) or exit at a fixed time. At 10:05 am price crosses 25,081 and the system buys; the 70-point target at 25,150 is hit by 1:30 pm, worth about 70 × 75 = ₹5,250 on one futures lot before costs. Hypothetical — false breakouts that tag the level and reverse are the strategy’s routine failure mode.

Why it matters

ORB is popular with systematic traders precisely because it is fully mechanical: range duration, breakout confirmation (close beyond versus touch), stop placement, target multiple and time exit are all explicit parameters. That also makes it easy to fool yourself — each parameter invites overfitting — so honest multi-year backtests, including choppy low-trend periods, matter more here than in most setups.

In INDfolio AI, an ORB system can be described in plain English and tested across years of NSE intraday data — see Intraday.