If hoping losers back is the deadly sin of exits, breakeven-itis is its quieter twin: the compulsion to move your stop to breakeven the instant a trade goes green, or to grab a tiny profit, purely for the relief of “not losing.” It feels prudent. It systematically destroys your reward-to-risk.
The psychology
The pain of watching a green trade turn red is intense — it feels like losing money you already had. So you rush to eliminate that possibility: tighten to breakeven, or just take the small win. The relief is immediate. But you've now capped a trade that had room to run at, essentially, zero — and you'll get stopped at breakeven on normal noise constantly, missing the big winners that were the whole point.
Why it wrecks your math
Your expectancy depends on winners being meaningfully larger than losers. Breakeven-itis does the opposite: it shrinks winners toward zero while your losers stay full-sized. You can win 65% of trades and still lose money because the wins are tiny and the losses aren't — the exact negative-expectancy trap from the worked example. Cutting winners short is mathematically the same disease as letting losers run.
“I never let a winner turn into a loser” sounds disciplined. It usually means “I never let a winner become a big winner” — and that's where the money was.
The fix
Pre-define your exit — a target or a scaled exit ladder that lets a runner run — and let it execute rather than reacting to every green tick. Taking partial profit while leaving a runner satisfies the urge to secure something without capping the trade. And moving to breakeven has a place (after a real move, on a runner), just not reflexively at +$5. Automated exits hold the plan so the fear of giving back a small gain can't shrink every trade you take.