Profit capture is the leak most traders never measure

Here is a number almost no trading journal shows you, and it is usually the largest single leak in the account.

Profit capture: of everything your winning trades offered, how much did you keep?

The calculation

Every trade has a maximum favourable excursion — the best unrealised profit it reached before it closed. Sum that across your winners, sum what you actually banked, and divide:

profit capture = Σ (winner net P&L) ÷ Σ (winner MFE) × 100

If your winners collectively reached $12,000 unrealised and you banked $5,000, your profit capture is 42%.

What good looks like

• Above 60% — you are letting trades finish.
• 40–60% — normal, with room to improve.
• Below 40% — the exits are the problem, not the entries.

The distribution matters as much as the average. A trader who consistently keeps 55% is in a different situation from one who keeps 90% on most trades and 10% on a few — the second is holding to target most of the time and panicking occasionally.

Why it is invisible

Because a winning trade feels like a success. You were right, you made money, the journal shows green. Nothing about the experience flags that you left two thirds of it behind.

MFE is the only thing that makes it visible, and it requires either a broker that reports it or a journal that reconstructs it from price data.

Why it is the cheapest fix

Improving your entry is hard. It means finding a better setup, a better filter, a better read of context — months of work with an uncertain payoff.

Improving your exit is a rule. "Do not touch the position before 1.5R." That is it. It costs nothing, requires no new skill, and can be adopted tomorrow.

And the maths is favourable. Going from 42% to 60% capture on the same trades is a 43% improvement in gross profit, without taking a single additional trade or a single dollar more risk.

The caveat worth stating

Chasing profit capture to 100% is not the goal. That would mean holding every winner to its exact peak, which is only possible with hindsight, and trying would mean turning winners into losers.

The goal is to stop the specific behaviour that produces a very low number: closing a trade in profit because being in profit is uncomfortable. That is not risk management. It is relief-seeking, and it has a price you can now put a figure on.