Mechanism
Entries feel controllable. Exits happen under stress: stops trigger in fast markets, profit targets trigger in spikes, and liquidity is worst exactly when everyone wants the same exit.
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
- You enter during liquid conditions and ignore the exit window.
- Volatility rises, depth falls, and your exit becomes expensive.
- Stops slip or targets fill partially, distorting your expectancy.
- You start ‘managing’ with emotion because the plan assumed clean exits.
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
- Plan exits first: where is the liquidity when you need it?
- Avoid holding size into known thin windows (rollover, session handover, weekends).
- If exits are uncertain, reduce size until they become survivable.
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 trade looks perfect at entry. Then you hold into a thin window and discover your stop is not a guarantee, it’s a request.
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
Deep dive
Entry is a decision. Exit is often an auction. Trade plans that focus on entry precision but ignore exit liquidity are backwards.
If you want one metric to watch: depth and spread stability in the window you expect to exit.
Glossary: order book depth, market impact.
Related: Spread is a risk limit, not a cost.
Variants merged
This page consolidates closely-related entries into one stronger canonical reference. Retired versions now redirect here.
Variant merged: Liquidity Is Easier to Enter Than Exit
Why it’s included: Variant emphasis: entry is optional; exit is mandatory. The market can always give you a quote, but it may not give you size when everyone wants out.
Truth line: Entries feel easy because you choose timing. Exits are hardest when you do not choose the timing.
Mechanism add-on: You usually enter when conditions look calm. You often exit when conditions are hostile.
Failure add-on: Assume easy exit → oversize → adverse move → urgency → market exit → slippage/impact → loss larger than plan → spiral.
Rule add-on: Size for the exit, not the entry. Stress-test: 'If I must exit in 10 seconds, what is the real cost?' Then size accordingly.
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.