Psychology
Confirmation bias, anchoring, recency — the mistakes that kill PnL
- Identify three cognitive biases that hurt trading
- Build a simple personal checklist to catch them in real time
- Use the journal as an objective debugger
You can know every economic indicator and every technical pattern and still lose money. The reason: your brain is a survival machine, not a probability engine. The biases that helped your ancestors avoid lions actively harm your trading. Awareness is the first step.
Confirmation bias — the silent killer
You unconsciously seek information that confirms what you already believe. Long USD? You read the hawkish Fed take, skip the dovish one. Short EUR/USD? You notice the German PMI miss, ignore the recovery in services. Antidote: deliberately read the opposite case before trading. Steelman the counter-view.
Anchoring — fixed reference points
The first number you see anchors your judgment. Bought EUR/USD at 1.0800. Now it's 1.0750. Your brain sees 'losing 50 pips' instead of 'pair currently in a $0.0050 zone with X fundamentals'. Antidote: ignore your entry. Ask 'would I open this trade right now, knowing what I know?'
Recency bias — the last move dominates
The most recent event feels most important. USD just rallied 3 days running. Brain extrapolates: 'this won't stop'. Brain ignores: positioning, valuation, exhaustion. Antidote: look at the multi-month chart. The recent 3 days are usually a small fraction of the bigger picture.
Checklist every trade. Journal every decision. Reads opposing views. Sizes by how strong the case is, not how strongly it is felt. Wins through discipline.
Goes by gut. Doubles down on losers. Ignores the journal. Reads only confirming takes. Blames the market for losses.
You've been long GBP for 3 weeks. UK CPI just printed softer than expected. Your immediate reaction: 'this is just a one-off, GBP is still bullish.' What's happening?
- Three killer biases: confirmation, anchoring, recency
- Antidote 1: steelman the opposite case
- Antidote 2: ignore your entry; would you open this trade NOW?
- Antidote 3: zoom out — the multi-month picture matters more than 3 days
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