Bangkok sits seven hours ahead of London in winter and six in summer. That means the Asian session is not a quiet preface on our wall; it is the working morning. Students often draw the high and low of 00:00–07:00 ICT as if London is obliged to leave that box and never look back.
On EURUSD that obligation is imaginary. The box is a record of a thin auction. When London dealers come in, they frequently probe the high, print a wick, and spend the next two hours trading back through the midpoint. Calling that probe a 'breakout' is how homework charts fill with arrows that the afternoon then contradicts.
In the classroom we mark three facts before 13:45. First, the location of the box relative to the four-hour swing — is Asia sitting in the middle of a range, or pressed against last Thursday’s supply? Second, the width of the box in pips relative to the prior ten Asian sessions, not relative to a round number. Third, one sentence on what would make us treat a London print outside the box as acceptance rather than a probe: usually a close back outside on the fifteen-minute and a failure to re-enter the box on the next candle.
We do not teach a rule that says 'fade every London break of Asia.' That rule fails on Mondays after a large Sunday gap and on days when the daily chart is already mid-impulse. We teach you to write the condition down before the first London spike, so that you are not inventing it after the wick.
A useful drill from the chart pack: take twenty EURUSD Tuesdays, hide the London session with a card, write your condition, then reveal. Count how often the first break was a probe. Students are usually surprised by the number, then less eager to chase the first print.