Market structure break
What does it mean when a market stops making higher highs and lows, and why does that shift how a move should be read?
In plain words
Markets usually travel in sequences: an uptrend prints higher highs and higher lows, a downtrend prints lower lows and lower highs. A structure break is a move that violates that sequence, such as price falling below a prior low, ending the pattern that had been holding.
Why it matters
Structure breaks are how traders decide a trend has changed rather than merely paused. They often coincide with heavier volume and volatility, since stop orders and momentum positions clustered beyond the broken level are triggered. Because breakage is only confirmed after the fact, it is descriptive evidence, not a guarantee the new direction persists.
In a real week: ETH, week of 16 December 2024
ETH entered the week of 16 December 2024 after three up weeks and one down week. It opened at 3959.09, set its high of 4107.8 at 18:00 UTC Monday, then slid to a low of 3101.9 at 12:00 UTC Friday, after the high rather than before it. The weekly return was -17.11%, with the worst day at -6.84% on 18 December. Volume of 18.27bn ran 1.83 times the prior 12-week average, and the close of 3281.83 sat in the lower third of the range. The low-after-high sequence, heavy volume and lower-third close describe a break of the prior pattern.
A common mistake
Treating every break as a confirmed reversal. A single violated level can be reclaimed quickly, and structure is judged across multiple highs and lows rather than one bar.