Define the range before you define the breakout
A reliable opening range system starts with explicit session boundaries. If the range window is vague, every later breakout rule becomes vague too.
What a clean ORB script needs
- explicit opening range start and end times
- one clear breakout definition
- rules for failed breakouts and invalidation
- duplicate-entry prevention once the move is underway
The live-behavior test traders skip
Many ORB scripts look good on a screenshot but collapse when volatility spikes. The real test is how the script behaves around session transitions, repeated probes, and false breaks that appear and disappear intrabar.
Frequently asked questions
Should ORB logic use intrabar triggers?
Only if you have tested how they behave live. Bar-close logic is often safer for first versions.
Can an opening range system be alert-ready?
Yes, if the breakout and invalidation rules are explicit enough to survive live conditions.
References
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