Momentum
When trends have inertia
Markets have memory. When something starts moving in one direction, it often keeps going — at least for a while. This is momentum.
Think of it like a heavy ball rolling downhill. It doesn't stop on a dime. The bigger the push, the longer it rolls.
The momentum approach is simple: look at recent returns and follow the direction. If positive, the trend is considered up. If negative, down.
It's one of the oldest observations in markets. Not because it always works — it doesn't — but because it captures something real about how prices move: trends tend to persist before they reverse.
How it works
- Calculate the average return over the last N days (the “lookback window”)
- If positive → the trend is considered up — momentum investors would typically remain exposed
- If negative → the trend is considered down — they would typically reduce exposure
That's the core logic. No predictions, no opinions — just a mechanical reading of recent price direction.
Educational content only — not investment advice, recommendations, or a suggestion to act. Past performance is not indicative of future results. Your decisions are your own. Full disclaimer.
When it works, when it doesn't
Tends to work well in
Clear trends — markets that move decisively in one direction for extended periods.
Tends to struggle with
Choppy, sideways markets. When prices bounce up and down without direction, momentum generates false signals — and each one costs a trade.
The key insight: Momentum is an assumption of continuation. It assumes that recent direction carries information about near-term direction. Whether that assumption holds depends on the market regime.
See it in action
Pick a ticker and adjust the lookback window to see how momentum would have historically performed.
What to notice:
- Longer lookback windows (7-10 days) = fewer trades, smoother signals, but slower to react
- Shorter windows (1-3 days) = more reactive, but more noise and false signals
- The gap between strategy and buy & hold tells you whether momentum historically added value — or just added complexity
Your turn
Consider how this pattern relates to investment decisions in general. When someone buys an asset — are they following a trend that was already moving?
That's momentum thinking. There's no right answer. But knowing which assumption you're operating under helps you understand your own decisions — and whether they worked for the reason you thought.
Reflect in your JournalWhat you've learned
- -Momentum is the observation that assets moving in one direction have historically tended to continue — but not always.
- -The lookback window controls sensitivity: shorter reacts faster but generates more noise; longer is smoother but slower to adapt.
- -Momentum works best in sustained trends and tends to struggle in choppy, range-bound markets.
- -Comparing strategy vs buy & hold helps you see whether active timing added or subtracted value historically.
Want to test this?
Many experienced investors suggest practicing with a paper money account on a reputable broker before risking real capital. Many brokers offer free simulated trading environments where you can test strategies with real market data and no financial risk.
Paper trading lets you build confidence, understand execution, and see how a strategy behaves in real time — without the emotional weight of real money on the line.
Important
Everything on this platform is educational and didactic in nature. We do not provide investment advice, financial advisory, or recommendations to buy or sell any financial instrument. Past performance is not indicative of future results. All strategies shown are historical simulations for learning purposes only. Always do your own research and consult a qualified financial advisor before making investment decisions.
Educational content · Not investment advice or recommendations
We're educators, not advisors. Your decisions are your own. Disclaimer