Markets
The four moods of a market
Markets trend, range, compress and expand. The same tool that works in one condition fails in the next, which is why knowing the condition comes before any decision.
Ask what a market is doing and the honest answer is usually one of four things. It is trending, moving persistently in one direction with orderly pullbacks. It is ranging, oscillating between levels that have held. It is compressing, with volatility contracting as buyers and sellers converge. Or it is expanding, with volatility breaking out of that compression into a new move. Markets spend most of their time in one of these conditions and a dangerous minority of it in transition between them.
Why the condition comes first
Every technical tool carries an assumption about the condition it was built for. A trend-following indicator assumes persistence and is punished in a range, where every signal arrives just as the move reverses. A mean-reversion oscillator assumes a range and is punished in a trend, where "overbought" simply becomes more overbought. Neither tool is wrong. Each is wrong in the wrong weather.
This is why classification should come before any signal. The first question is not "what does the indicator say" but "which condition is the market in, and how confident can I be about that". Measures of volatility relative to its own history, of directional persistence, of how price behaves at prior levels, all help answer it. Only once the condition is known does it make sense to ask which evidence counts.
Transitions
Losses cluster at transitions. The end of a range looks, for a while, like a breakout, and the end of a trend looks, for a while, like a pullback. Both resolve only in hindsight. The practical response is not to predict the transition but to recognise the uncertainty: when the measures disagree, confidence is low, and low confidence is a reason to reduce exposure or stand aside, not to pick the more exciting interpretation.
Classification is not prediction
It is tempting to treat a regime label as a forecast. It is not. Saying a market is trending describes the recent past and the present; it says nothing about how long the trend will continue. The value of classification is narrower and more useful: it tells a participant which of their tools are currently fit for purpose and which are currently a liability.
A participant who knows the market's mood will still be surprised. They will simply be surprised less often, and with smaller positions, than one who did not ask.