There is a reason the same pattern shows up in account after account: we are wired to feel the pain of a loss far more sharply than the pleasure of an equivalent gain. So we reach for the certainty of a small, realised win — and we avoid the certainty of a realised loss by telling ourselves the position just needs more time. Sell the winner, hold the loser. Economists named it the disposition effect, and it is one of the most studied and most expensive habits in retail trading.

The damage is quiet because each individual decision feels reasonable. You don't notice it trade by trade. You notice it only when you step back and look at the shape of your behaviour across hundreds of trades — which is exactly where the data becomes useful.

Why it drains a profitable system

Recall what actually determines whether you make money: your expectancy, which depends on your average win and your average loss. The disposition effect attacks both sides at once. Cutting winners early shrinks your average win. Holding losers in hope inflates your average loss. A system that would be net positive if you simply let it run can be dragged below break-even purely by these two reflexes — no change in your entries required.

This is why "I just need a better strategy" is so often the wrong diagnosis. The entries may be fine. The exits are doing the bleeding.

The clean way to measure it: hold-time asymmetry

You don't need to read your own mind to detect the disposition effect. You need one comparison from your tradebook: how long you hold losing trades versus winning trades. Compute the median (or average) hold time of your losers and of your winners, and take the ratio.

Disposition ratio = median hold time of losers ÷ median hold time of winners

A ratio near 1.0 is healthy: you hold winners and losers for roughly the same amount of time, which means your exits are being driven by your plan rather than by which way the trade happens to be going. A ratio well above 1.0 — say you nurse losers for hours but snatch winners in minutes — is the classic disposition signature. The bigger the number, the more your account is shaped by discomfort instead of process.

A quick illustration

Imagine a trader whose winners are closed in a median of 25 minutes while losers are held for a median of 90. That is a ratio of roughly 3.6 — and it almost guarantees the average loss is larger than the average win, even if the entries are sound. The trader isn't unlucky. They are systematically giving losers the room they refuse to give winners.

What it is — and what it isn't

A high ratio is a flag, not a verdict. There are legitimate reasons winners and losers exit at different speeds: some strategies scale out of winners or use wider stops by design. The point of measuring it is not to force every trade into the same clock, but to make the asymmetry visible and deliberate rather than emotional. If you can explain the gap with a written rule, it's a feature. If you can't, it's the disposition effect.

In your report
Disposition Effect score (with Behavioural Analysis)

Know My Trade measures your hold-time asymmetry directly — the ratio of how long you hold losers versus winners — and reports it as a disposition score. A reading near 1.0 confirms you are not nursing losers while snatching at winners; a high reading tells you, in one number, that your exits are being driven by discomfort instead of your plan.

How to fix it

The disposition effect doesn't respond to willpower in the moment — that's precisely when the discomfort is loudest. It responds to decisions made before the discomfort exists:

The losses themselves are not the problem — every system has them. The problem is treating a winning trade and a losing trade as two different emotional events instead of two outcomes of the same plan. Close that gap and your average win and average loss start working for you instead of against you. It pairs naturally with watching what a losing run does to your next decisions, covered in tilt and revenge trading.