What Is Momentum?
Momentum measures the speed and strength of a price movement. It answers the question: "How fast is price moving in a given direction?" Positive momentum means price is accelerating upward; negative momentum means it's accelerating downward. Momentum can be increasing even while price moves — indicating building strength — or decreasing while price moves — indicating fading strength.
How Momentum Works
Momentum indicators include RSI, MACD, Stochastic Oscillator, and Rate of Change (ROC). They measure whether a current move is gaining or losing strength. The most valuable signal is divergence: when price makes a new high but the momentum indicator makes a lower high, it signals the uptrend is weakening and may reverse.
Why It Matters for Traders
Momentum leads price. Deteriorating momentum often precedes price reversals by several candles, giving traders early warning. Momentum-based strategies — buying when momentum turns positive, selling when it turns negative — capture the most efficient portion of a move while avoiding exhaustion phases. In crypto, momentum shifts on the 4H timeframe are particularly actionable.