What is change of character?

What it means

In an uptrend made of higher highs and higher lows, the first close below the most recent higher low is the change of character. It does not confirm a downtrend — it confirms that the uptrend's defining sequence has been broken, which is a weaker and more useful claim.

Why it matters

Traded directly it is a poor signal, because most trends produce several of these before actually reversing. Used as a filter it is a good one: refusing to add to a position after a change of character avoids the largest category of trend-following loss, which is holding a trend that ended some time ago.

What this changes in practice

This is the shape of most genuinely useful structural concepts. They are better at telling you when to stop than at telling you when to start, and our own results agree — the strategies that survived our cull were mostly those whose gating logic prevented bad trades rather than those whose entry logic found good ones. Our STRUCTURE-SHIFT strategy, which traded it directly, lost $60.42 at a 30% win rate and is disabled.