Beneath the charts, markets run on two emotions: fear and greed. Prices don't just reflect value — they reflect a crowd oscillating between the urge to chase and the urge to flee. The same rhythm plays out inside every trader.

The greed phase

As prices rise, optimism builds into euphoria. FOMO takes over, latecomers pile in at the top, and risk feels invisible — exactly when it's highest (FOMO). Greed makes traders oversize, chase, and ignore stops, because it feels like easy money will last forever (overconfidence).

The fear phase

When it reverses, optimism curdles into fear and then panic. Traders who chased the top now sell the bottom, dumping in capitulation right as risk is lowest. Fear makes people freeze, cut winners, and abandon plans (loss aversion). The crowd reliably feels best at tops and worst at bottoms.

The crowd is most greedy where risk is highest and most fearful where it's lowest. Feel the opposite of the crowd and you're usually early; feel the same and you're usually late.

Using the cycle

You can't perfectly time it, but you can notice it: when you feel euphoric certainty, size down; when you feel panic, don't dump blindly. Sentiment tools like the fear-and-greed index and put/call ratio quantify the crowd (the put/call ratio). Best of all, a mechanical system feels neither emotion — it sizes and exits by rule while the crowd swings (mechanical vs discretionary).