What is ORB?
ORB high and ORB low are fixed intraday structure levels after the opening window is complete.
Market structure & levels
Opening Range Breakout explained
Opening Range Breakout, or ORB, monitors the boundaries of an initial session range. AlertoWatch defines ORB from the first 15 minutes of the UTC day.
How it works
The engine records the highest high and lowest low during the first 15 minutes of the UTC day. Those levels remain constant for the rest of that UTC day.
How traders often interpret it
A move above ORB high can be read as an upside break of the initial range, while a move below ORB low can be read as a downside break. Neither guarantees continuation.
What it can be useful for
- session-structure monitoring
- opening-range crossings
- intraday breakout context
- combining breakouts with volume
Using ORB in AlertoWatch
Turn the indicator relationship into a precise monitored condition. These are plain-English rule ideas, not recommendations or promises about market outcomes.
- Alert me when price crosses above ORB high.
- Alert me when price crosses below ORB low.
- Alert me when price crosses ORB high with above-average volume.
Limitations
Not every opening-range break becomes a sustained move. AlertoWatch uses a specific UTC-day session definition that may differ from other ORB conventions.
FAQ
Which opening window does AlertoWatch use?
The documented ORB uses the first 15 minutes of the UTC day.
Does an ORB break guarantee continuation?
No. It only reports movement beyond the opening-range boundary.
Why combine ORB with volume?
Volume adds participation context to the breakout.
How are ORB conditions exposed?
ORB high and low are price-like levels in supported crossover rules.