Why can you not take the next opportunity after a bad loss?

Why this matters. The mirror image of the previous lessons, and the one people admit to least. Nothing has gone wrong that you can point at; you simply cannot press the button.

The criteria are met. The idea is sound. You have checked it twice. And you do not act — then watch it do exactly what you expected.

What is happening

A recent large loss raises the felt cost of being wrong again far above its actual cost. The next decision is not being evaluated on its own terms; it is being evaluated as a chance to repeat something that just hurt.

Documented but thin: Lo and Repin (2002) measured physiological responses in professional traders during live sessions — ten subjects, so treat it as a demonstration that bodily response tracks market events rather than as a general result. The often-quoted "optimal arousal" curve from Yerkes and Dodson (1908) is worth naming here only to warn you off it: it was established on mice under electric shock, and nearly every use of it in trading writing is an extrapolation the original does not support.

So: something real happens, and the confident-sounding physiological story you will read elsewhere is mostly not supported. Both halves of that matter.

Why this is not the opposite problem

It looks like excessive caution and it is not caution at all. Caution would apply evenly. This applies only to the next decision, and only because of the last one — which makes it the same error as revenge-taking, pointed the other way. Both let the previous outcome set the size of the next one.

The artefact

A skipped-signal log: entries you did not take that met your criteria, with the date and one line on why.

It is uncomfortable to keep and it is the only way to see this at all. Freezing leaves no trace by nature — a position not taken produces no record, no P&L line, nothing. Written down, the pattern becomes visible: skips cluster after losses, and you can read the clustering off a page instead of arguing with yourself about whether it is happening.

Try it now

Write down one signal you did not take in the last month, and the date of your most recent significant loss. Note the distance between them.