The trader's cognitive biases
Your worst enemy in trading isn't the market: it's your own brain. It's built to survive on the savanna, not to make financial decisions under uncertainty. These mental shortcuts make you lose money systematically — and the first step to beating them is naming them.
🔍 Confirmation bias
You seek only the information that supports your open trade and ignore signals against it. You're already long, so you only read bullish analysis.
Antidote: before entering, write what would prove you wrong. If price does that, you exit. Make your thesis falsifiable.
⏱️ Recency bias
You over-weight what just happened. After 3 wins you feel invincible; after 3 losses you abandon a good system. See losing streak.
Antidote: judge your system by dozens of trades (your stats), not the last three.
⚓ Sunk cost
You hold a losing trade "because I've already lost so much, I won't close now". Lost money doesn't come back by holding; you only risk more.
Antidote: at every moment ask: would I open this trade TODAY from scratch? If not, close it. The past is irrelevant.
🎲 Gambler's fallacy
"5 losses in a row, the next one is surely a winner." The market has no memory: each trade is independent. The streak isn't "owed" to anyone.
Antidote: don't size up to "recover". That's the road to martingale and ruin.
💔 Loss aversion
Losing hurts twice as much as winning feels good. So you close winners early (to lock in pleasure) and let losers run (to avoid pain) — the exact opposite of what's profitable.
Antidote: stop-loss and take-profit defined BEFORE entering, and untouched. Let rules, not pain, close your trades.
😎 Overconfidence and hindsight bias
After a win you think "I knew it" (even if it was luck) and believe you're better than you are. You size up right before reality corrects you.
Antidote: an honest journal. Log your reason and your confidence BEFORE the outcome; it'll humble you with data.
What almost nobody gets: you can't "eliminate" these biases — they're wired into your brain. What you can do is design your trading so they don't depend on you in the heat of the moment: written rules, automatic stops, daily loss limits, calculated position size. Our whole philosophy —measure instead of opine, a plan over the impulse— exists precisely to get your biased brain out of the driver's seat at the critical moment.