RiskPicksWhat is Confirmation Bias?
Confirmation bias is the tendency to look for, interpret, and remember information that confirms what you already believe, while dismissing information that contradicts it. In trading, this means you see what you want to see on the chart rather than what is actually there.
How it shows up in trading
- Cherry-picking indicators: the RSI says overbought but you ignore it because the MACD just crossed bullish. You picked the indicator that agrees with your trade
- Ignoring red flags: the stock broke below support but you tell yourself "it is just a shakeout" because you are long and do not want to sell
- Seeking validation: you enter a trade and then go looking for other people on social media who agree with your thesis. If you find bearish opinions, you dismiss them
- Adjusting your thesis: the original reason you entered the trade no longer applies, but you find a new reason to stay in instead of cutting the loss
Why it is dangerous
- Holds you in losing trades: you keep finding reasons to stay instead of taking the loss
- Prevents you from learning: if you only see what went right and ignore what went wrong, you repeat the same mistakes
- Creates overconfidence: surrounding yourself with agreeing voices makes you feel certain when you should feel cautious
How to fight it
- Actively look for the opposing case: before entering a trade, make the argument for why it will fail. If you cannot, you have not done enough research
- Let your stop loss decide: remove emotion from the exit decision. The stop is where you are wrong, period. No rationalizing
- Review losing trades honestly: when you review your journal, focus on what you missed, not what confirmed your bias
The best traders actively try to prove themselves wrong before entering a trade. If they cannot find a reason to stay out, then the setup is worth taking.