Here’s a test of your position sizing: when a trade hits its stop, what happens to your evening? If the answer is anything other than “nothing,” the position was too big — regardless of what the chart said.

Trades are draws from a distribution

A single trade tells you almost nothing. Even a genuinely good system loses 40–50% of the time; even a bad one wins often enough to fool you. Skill only shows up across dozens of trades — which means the unit of success is never the trade. It’s the series.

The moment you accept that, sizing stops being about conviction and starts being about survival math. Risking 1% per trade means a ten-trade losing streak — which will happen, to every system, including mine — costs under 10% of the account. Annoying. Recoverable. Risking 5% per trade, the same ordinary streak costs 40%, and now you need a 67% gain just to get back to zero. Same system, same signals, same market: one sizing survives its own variance, the other doesn’t.

The psychological dividend

The underrated benefit of small risk isn’t mathematical — it’s that it makes you sane. When no trade matters, you take the stop-loss without flinching, because it’s a rounding error. You don’t revenge trade, because there’s nothing to avenge. You follow the system, because no single outcome tempts you to override it. Nearly every trading psychology problem people try to fix with journaling and meditation is actually a position-sizing problem wearing a disguise.

I’ve taken stop-outs this year that cost real money, logged them in the same evening’s notes as the trades that worked, and slept fine. Not because I’m disciplined by nature — because the sizing made discipline cheap.

The uncomfortable corollary

If no trade should matter, then no trade deserves excitement either. The winning trades are also boring. That’s the trade-off nobody advertises: a durable process feels like operating a machine, not riding a rocket. If you came to markets for adrenaline, this will disappoint you. If you came to still be here in fifteen years, it’s the whole game.

Educational only — my own process, not investment advice. Past performance is not an indication of future results.