Mechanism
Re-entry is often treated as “the same idea, still valid”. Mechanically, it is not the same trade.
Each attempt crosses the spread and exposes you to slippage, especially if the market is choppy or fast. Multiple attempts can turn a neutral day into a meaningful drawdown purely through friction and noise.
Re-entry can be correct, but only when it is designed: with a maximum number of attempts and a clear “what changed?” trigger.
Microstructure note: stops fail most often at the same time liquidity disappears. That is not bad luck; it is structural. Your job is to avoid competing for fills in the worst queue.
- Prefer “don’t trade” windows over cleverness: rollover, open/close, data prints.
- Reduce size before you reduce stop distance. Size is the only lever that always works.
- Measure slippage by regime, not by average.
How it kills accounts
Stop-out → immediate re-entry → repeat → friction stacks → confidence drops → standards loosen → overtrade → daily loss cap breached.
How it kills accounts:
- Edge looks fine in backtest.
- Live spreads widen at the exact wrong moments.
- Stops trigger inside noise, so you widen stops.
- Same size + wider stop = silent leverage increase.
- A normal spike becomes structural damage.
Rule that survives
Define re-entry criteria before the first entry.
Limit attempts per setup (e.g., 1–2). After that, stop trading the idea.
Treat re-entry as a separate trade with a separate risk budget.
Rule that survives:
- Spread is a gate, not a footnote. If it’s abnormal, you don’t trade or you trade smaller.
- Assume worst-case fills in fast markets.
- Size is the adapter: reduce size before changing the stop model.
Example archetype
A level chops all morning. You get stopped, re-enter, and get stopped again. By the time the move finally happens, you’re down from friction and emotionally impaired.
Tell: if the trade only works when the spread is tight and price is smooth, it’s not an edge, it’s a regime bet.
Deep dive
What changed?
If you can’t state what changed between entry #1 and entry #2, re-entry is usually impatience.
Related: Costs are a strategy and Being flat is a position.
Glossary: spread, slippage, opportunity cost.
Field checklist
- Measure spread before entering. If it’s abnormal, you’re trading the wrong product at the wrong time.
- If volatility expands, reduce size first. Don’t “solve” it by widening stops with the same size.
- Avoid the predictable liquidity holes: rollover, session open/close, first minutes after data.
- Assume your stop may fill worse than your entry. Price the worst-case, not the brochure.
- If you cannot explain where liquidity comes from, trade smaller.