Methods and systems
Trend following vs mean reversion
4 min
Almost every systematic edge falls into one of two opposing philosophies about what price tends to do next.
Trend following
The bet: a move in motion tends to continue. Trend followers buy strength and sell weakness, trying to ride an established trend for as long as it lasts.
- Wins are large, losses are small — but wins are infrequent. Most trades are small losses, redeemed by a few big runners.
- Requires the discipline to sit through many small losses waiting for the trend that pays for them all.
- Tools: moving averages, breakouts, higher-high/higher-low structure.
Mean reversion
The opposite bet: price that has stretched too far tends to snap back to an average. Mean-reversion traders sell what looks overbought and buy what looks oversold.
- Wins are frequent but small; losses are infrequent but large — the mirror image of trend following.
- Feels good (a high win rate) but a single failure to revert — when an overbought market just keeps going — can erase many wins.
- Tools: oscillators (RSI, stochastics), Bollinger Bands, ranges.
Why this matters
The two thrive in opposite conditions: trend following needs trending markets and bleeds in ranges; mean reversion needs ranges and gets crushed in strong trends. No edge works everywhere. Knowing which one you are running — and which environment you are in — is half the battle.
This content is for educational and informational purposes only and is not investment, financial, tax or legal advice. Trading and investing carry risk, including the possible loss of capital. Any performance shown by third-party tools is hypothetical and not a promise of future results. Do your own research and consider professional advice before making any decision.