Scheduled Economic Releases and the Morning Range
Most of what moves the broad index arrives at a time that was published weeks earlier. That is unusual and it is useful, because it means the single largest influence on the morning's range is knowable before the morning begins. A trader who checks the calendar first is not forecasting anything. They are reading a schedule.
Know the Calendar Before the Chart
Major macro releases cluster in a narrow band around the cash open, some shortly before it and some inside the first hour. Central bank statements come later in the day, but their anticipation shapes the morning regardless. Which of these is due today changes what the opening range will be made of, and finding out takes seconds.
The check belongs before the range is drawn, not afterwards when it looks strange. A wide range explained by a release is a completely different object from a wide range with no obvious cause, and knowing which one you have in front of you changes whether the width is a reason to stand down or simply the expected consequence of an event you already knew about.
A Release Before the Open
When the number lands ahead of the cash session, the repricing happens in the pre market. By the time the regular session opens, the market has already digested the surprise, and the opening range that forms is a range around a new and adjusted level.
This is the most workable of the three cases. The event risk has passed, the range is being built by ordinary participation at a fresh price, and the edges carry their usual meaning. The one caveat is that the day's available movement may be partly spent, since a large repricing before the open has already used some of the distance the session had in it.
A Release Inside the Range Period
This is the case that breaks the measurement. If the number arrives partway through the period you use to define the range, the range contains two regimes: several minutes of pre release drift, then a violent repricing that has nothing to do with the drift.
The resulting high and low are not levels anybody defended. One of them is the extreme of a spike, reached in seconds, possibly on a print that existed for a moment. A breakout rule applied to that range is being applied to a shape it was never designed for. The reasonable options are to skip the session outright, or to redefine the range from after the release using a period that begins once the initial reaction has burned itself out, and to say in advance which of those you will do.
A Release Shortly After
The most awkward arrangement is a clean range followed by a release just after it completes. Everything looks correct. The range is well formed, both edges were tested, the setup is textbook, and then a number lands and pushes price through your level for a reason that has no connection to the structure you were trading.
The trade may well work. It works for the wrong reason, which matters because the identical arrangement will hand you an equally arbitrary loss on another morning. If the plan is to trade through a release at all, the honest description is that the position is exposed to an event, and it should be sized as an event trade rather than as a normal breakout that happens to coincide with one.
The Simple Handling
The whole issue collapses into a short pre session routine. Look up what is scheduled and at what time. If something significant lands inside the range period, either skip the session or shift the measurement window. If it lands shortly after, decide before the range completes whether you are willing to hold through it, and reduce size if the answer is yes.
None of this requires a view on what the number will be. Forecasting the release is a separate and considerably harder activity, and the handling described here works without any opinion at all. It only requires knowing that an event is due, which is information that is free, published in advance, and ignored surprisingly often by people who then spend the afternoon trying to explain what happened to their range.