Home / Blog / How Momentum Stocks Work
Strategy Guide

How Momentum Stocks Work

📅 September 25, 2025 ⏱️ 7 min read By ScoreMyStock Team

Momentum investing is one of the most profitable but also most misunderstood strategies in the market. At its core, it's simple: stocks that are going up tend to keep going up, and stocks going down tend to keep going down. But knowing when to jump on board and when to step aside? That's where the real skill comes in.

What Creates Momentum?

Momentum isn't random. It's driven by psychology and market structure. When a stock breaks out to new highs, it attracts attention from traders, algorithms, and institutions. This buying pressure creates more gains, which attracts more buyers, creating a self-reinforcing cycle.

Think of it like a snowball rolling downhill — it starts small but gains mass and speed as it goes. The same happens with stock prices during momentum runs. Each new high brings in a fresh wave of buyers who don't want to miss out.

Key Insight:

Momentum is strongest when it's backed by both price action AND volume. Price alone isn't enough — you need to see heavy trading activity confirming the move.

The Three Phases of Momentum

Phase 1: The Breakout

This is where momentum begins. The stock breaks above a key resistance level — often a 52-week high or a major consolidation pattern. Volume spikes as buyers overwhelm sellers.

What to watch: Look for volume at least 50% above average. The breakout should be decisive, not a slow grind.

Phase 2: The Acceleration

The stock continues higher with consistent gains. Each pullback is shallow and short-lived. This is the sweet spot where most profits are made.

What to watch: Price stays above the 50-day moving average. RSI between 50-70 shows strength without being overbought.

Phase 3: The Exhaustion

Gains become parabolic and unsustainable. Volume often decreases even as price rises. This is when late buyers pile in at the worst time.

What to watch: RSI above 80, declining volume on up days, increased volatility. Time to take profits.

Volume: The Momentum Validator

Price can lie, but volume tells the truth. Strong momentum moves are always accompanied by heavy trading volume. Here's why it matters:

  • High volume on up days: Confirms buying interest and validates the move
  • Low volume on down days: Shows sellers are weak, bulls remain in control
  • High volume on down days: Warning sign — momentum may be reversing
  • Declining volume on up days: Momentum is fading, fewer buyers participating

When to Enter a Momentum Trade

The best entry points for momentum trades:

1. On the breakout: As the stock clears resistance with strong volume. Most aggressive entry.

2. On the first pullback: Wait for the stock to pull back to the breakout level and hold. Lower risk.

3. On moving average bounces: During Phase 2, buy when price touches the 21-day or 50-day MA and bounces.

⚠️ Never chase parabolic moves

If a stock has already doubled in a month, you're late. Wait for the next setup.

When to Exit

Knowing when to sell is more important than knowing when to buy. Here are the key exit signals:

Technical Signals

  • • Break below 50-day MA
  • • RSI drops below 50
  • • Volume dries up on rallies
  • • Multiple bearish days in a row

Market Signals

  • • Overall market turns bearish
  • • Sector rotation away from your stock
  • • Rising interest rates (for growth)
  • • Your stop-loss is triggered

Common Momentum Mistakes

❌ Buying without confirmation

Jumping in before the breakout is confirmed. Wait for price AND volume confirmation.

❌ Not using stop-losses

Momentum reverses quickly. Always have a stop-loss 7-10% below your entry.

❌ Holding through weakness

When momentum fades, exit immediately. Don't hope it comes back.

❌ Fighting the trend

Never short strong momentum stocks or buy falling ones hoping for a bounce.

Putting It All Together

Momentum investing works because trends persist longer than most people expect. But it requires discipline, quick decision-making, and strict risk management. You need to be right on timing AND be willing to cut losses fast when you're wrong.

The best momentum traders don't fall in love with stocks. They ride trends while they last and move on when momentum fades. Stay objective, follow the signals, and let the winners run while cutting the losers short.

Find Today's Momentum Leaders

See our daily momentum stock scores based on price action, volume, and technical strength.

View Momentum Report

Related Articles