Markets move in two broad modes. Momentum (trend) is when a move feeds on itself - up begets up. Mean reversion is when price stretches too far from an average and snaps back - extremes get faded. Almost every strategy is, underneath, a bet that one of these will dominate.

Why it matters so much

The catch: a strategy tuned for one regime actively loses in the other. Buying breakouts (a momentum approach) gets chopped to pieces in a mean-reverting, range-bound tape. Fading extremes (mean reversion) gets steamrolled in a strong trend - the exact trap behind misreading RSI overbought or a Bollinger band touch. Being right about the regime matters more than the entry.

How to read the regime

Clues stack up: are new highs holding or reversing? Is volume expanding on moves or fading? Is price respecting the VWAP as support/resistance or slicing through it? Crucially, dealer positioning tips the odds - a positive-gamma regime tends to dampen moves (mean reversion), while a negative-gamma regime amplifies them (momentum).

The best entry in the wrong regime is still a losing trade. Read the environment first.

Adapting instead of guessing

No single strategy is right all the time, because the market is not always in the same mode. The edge is in adapting - recognizing which regime is active and applying the approach that fits it, rather than forcing one style through every condition. That regime-awareness is exactly the kind of read a disciplined, structure-first system is built to make.