Whipsaw
TradingDefinition
A sharp price move in one direction followed almost immediately by an equally sharp reversal - the market "saws" back and forth, punishing traders on both sides of the move. Whipsaws are most common around major news events, in thin liquidity, and in range-bound markets where breakouts keep failing.
Trend-following strategies are especially vulnerable: the initial move triggers their entry signal, then reverses before a real trend develops, producing a string of small losses. Slower signals (a 100-day moving average instead of a 20-day), wider stops, and smaller position sizes are the standard defenses - fewer false signals, at the cost of later entries. This is exactly why managed-futures funds can grind sideways for years in choppy markets, then earn it all back in one sustained trend like 2022.
Trend-following strategies are especially vulnerable: the initial move triggers their entry signal, then reverses before a real trend develops, producing a string of small losses. Slower signals (a 100-day moving average instead of a 20-day), wider stops, and smaller position sizes are the standard defenses - fewer false signals, at the cost of later entries. This is exactly why managed-futures funds can grind sideways for years in choppy markets, then earn it all back in one sustained trend like 2022.
Example
A stock breaks above resistance at $100 and trend traders buy. Within days it drops to $95, hitting their stops - then rallies back through $101. Both the breakout buyers and the short-sellers who chased the breakdown lost money on a round trip that ended roughly where it started.