What is the difference between trend following and mean reversion?

These are opposites. Confuse them and you'll lose money.

Trend following says: Buy strength, sell weakness. Mean reversion says: Buy weakness, sell strength.

A stock is at a 52-week high and moving higher. A trend follower buys. A mean reversion trader shorts. Both think they're right. One of them is making money. One is getting destroyed.

**Trend following setup:**

Price is above the 50-day moving average. Price is making higher highs and higher lows. The uptrend is clear.

A trend follower buys near resistance because resistance is breaking. They expect the move to continue. They hold for days or weeks. They sell when the trend breaks.

In this scenario, the stock moves from $100 to $120. The trend follower makes $20. The mean reversion trader shorted at $100, got stopped out at $105, and lost $5.

**Mean reversion setup:**

Price is at a 52-week high. It's up 50% in two months. Price is extended from the 20-day moving average. It's overextended.

A mean reversion trader shorts because price is too extreme. They expect it to pull back. They hold for days. They cover when price bounces.

In this scenario, the stock is at $120. It pulls back to $110. The mean reversion trader covers their short and makes $10. The trend follower who bought at $100 holds through the pullback. The stock bounces to $130. The trend follower makes $30.

**When each works:**

Trend following works in trending markets: - Clear uptrends - Clear downtrends - Price making higher highs (up) or lower lows (down) - Long holding periods

Mean reversion works in range-bound markets: - Price bouncing between support and resistance - Overbought/oversold conditions - Short holding periods - Choppy sideways action

In a trending market, mean reversion traders lose money. They short the rally, get stopped out, watch the stock go higher.

In a range-bound market, trend followers lose money. They buy the top of the range, get stopped out, watch it drop.

**The psychological trap:**

New traders often flip between the two. They see trend following fail during a sideways market, so they switch to mean reversion. Then the market starts trending and mean reversion fails. They switch back.

This is the worst approach. You're switching systems when they're underwater. You're exiting winners early and entering losers late.

Professional traders pick one and stick with it through different market conditions. They understand that no strategy works all the time. Some months it doesn't work. But over the year, it does.

**Real example of each:**

Trend following in 2023: - Stock Market (trending up) - A trend follower buys dips during the uptrend - They make money - A mean reversion trader shorts rallies - They lose money

Mean reversion in late 2024 (if sideways): - A choppy back-and-forth market - A mean reversion trader buys the dips and sells the rallies - They make money - A trend follower waits for a breakout that never comes - They make nothing or lose on false breakouts

**The time horizon difference:**

Trend followers hold for days, weeks, or months. They're not timing intraday bounces. They're riding large moves.

Mean reversion traders hold for minutes, hours, or days. They're timing bounces. They're not holding for the big move.

A day trader trying mean reversion might be in a trade for 15 minutes. A trend follower might be in a trade for 15 days. Same strategy framework, completely different execution.

**Mixing the two (advanced):**

Some traders use both, but in different timeframes: - Weekly chart: Use trend following to identify the direction - Daily chart: Use mean reversion to find entries within the trend

Example: Weekly chart shows an uptrend. Daily chart shows the stock pulled back to support. A trader buys the daily dip (mean reversion) within the weekly uptrend (trend following). This is advanced, but it works.

For beginners: Pick one. Master it. Stop switching.

**Which one should you use?**

If you can watch the market frequently and like quick trades: Mean reversion. If you like longer-term positions and fewer trades: Trend following. If you're unsure: Trend following is easier to understand and has fewer false signals.

Most new traders actually want mean reversion (getting deals on dips) but they're better at trend following (just riding up). Don't pick based on what sounds cool. Pick based on what actually fits your personality.