The feeling
“Seven in a row. I’ve got this now. I can see the moves before they happen. My old size is too small for someone trading this well. Let’s step it up.”
It feels like confidence. Often it’s the start of the next big drawdown.
The short answer
Overconfidence after a winning streak is the belief that a run of wins proves your skill, so you can take more risk and follow fewer rules. Streaks happen by chance in every method. When the normal losses come back, they hit at the bigger size, and the streak’s profit can disappear in a few trades.
The fix: keep size and rules the same during a streak, change size only in a scheduled review based on many trades, and check whether the streak’s trades actually followed the plan.
Why your brain does it
- Wins feel like skill, losses feel like luck. This uneven scoring makes us think we’re better than we are. Simon Gervais and Terrance Odean built a model of traders who learn about their own ability this way. In their words, the trader “weights his successes more heavily than would a true Bayesian”, and in their model overconfidence grows early in a trader’s career, then fades as experience shows the trader his real ability (Review of Financial Studies, 2001; abstract).
- Recent results feel like the future. Seven wins make the eighth feel certain. It isn’t.
- Success feels like permission. Rules you followed when unsure start to feel like training wheels you no longer need.
How often streaks happen by luck
Simple probability, not a forecast. Say every trade is a coin flip: a 50% win rate, each trade independent.
- The chance that a given set of 7 trades are all wins is 0.5⁷ = 0.78%, about 1 in 128.
- But over 200 trades, the chance of at least one run of 7 wins somewhere is about 54%. (Worked out step by step by script.)
So a seven-win streak is more likely than not to show up over 200 trades even with no edge at all. A streak is not proof. A method is judged on many trades: expectancy, drawdowns and a large sample. See backtesting a gold strategy.
A gold example: sizing up at the wrong moment
Example numbers. After a streak, a trader raises risk from 1% to 4% per trade. Then the method does what every method does: it has a normal run of 4 losses.
- At 1% risk: 0.99⁴ ≈ 0.961, so the account is down about 3.9%.
- At 4% risk: 0.96⁴ ≈ 0.849, so the account is down about 15.1%. To get back to where it was, it needs a gain of about 17.7%.
On gold the jump in size is easy to miss. Going from 0.10 lot to 0.40 lot “feels” small on screen. But every $1 move goes from $10 to $40. A normal $8 stop goes from $80 to $320.
The risk of ruin calculator shows how fast bigger risk raises the chance of a deep drawdown.
Warning signs
- You raised your lot size during the streak, without a written rule.
- You skip the checklist because “I know this setup”.
- You trade setups or sessions you used to avoid.
- You tell friends you’ve “figured it out”.
- You start planning to trade full-time, or to borrow to trade bigger.
Five fixes you can do today
- Freeze your size during streaks. Size changes only in a monthly review. A common rule is a fixed risk percentage of the account, so lots grow slowly as the account grows, not jump because of a feeling.
- Review the streak. For each winning trade, ask: did it follow every rule? Wins from broken rules are luck, and luck runs out. Use grade decisions, not outcomes.
- Plan the losing run now. Write: “When my next 5 losses come, I will…” Your losing streak plan is easier to write while you feel good.
- Keep the checklist, every trade. Especially the ones that feel obvious.
- Take some profit out. Withdrawing part of the streak’s profit makes it real and can’t be given back. See paying yourself.
Your rule card
My “winning streak” rules
- ☐ My risk per trade stays ____ % during a streak.
- ☐ Size changes only in my monthly review, by one small step.
- ☐ I check every streak trade: did it follow the plan?
- ☐ My plan for the next losing run is written down.
- ☐ I take ____ % of the streak’s profit out of the account.
Confidence vs overconfidence
Confidence is useful. It lets you take your setups without freezing (fear of pulling the trigger is the opposite problem). The difference:
| Confidence | Overconfidence |
|---|---|
| “I trust my plan over many trades.” | “I can’t lose right now.” |
| Same size after wins and losses | Bigger size after wins |
| Checklist on every trade | Checklist skipped on “obvious” trades |
| Expects losing runs | Forgets losing runs exist |
Aim for the left column. It feels less exciting, and lasts much longer.
Common mistakes
- Believing the streak means the market “changed in your favour”. Markets don’t know who you are.
- Doubling size after a streak, then halving it after the first losses. That buys high and sells low on your own skill.
- Ignoring how many trades the streak is out of. Seven wins out of 10 means little. 55% over 300 trades means more.
- Mixing overconfidence with greed. After one big win, see greed after a win. After many wins, it’s this page.
Sources
- Gervais, S. and Odean, T. (2001), “Learning to Be Overconfident”, Review of Financial Studies 14(1), 1–27, doi:10.1093/rfs/14.1.1. The quote is from the abstract on the author’s page. It is a model of traders, not a survey of gold traders.
- Streak probability (at least one run of 7 wins in 200 independent trades at a 50% win rate) and the drawdown maths were computed by script. Real trades are not perfectly independent.
- Account sizes and lot sizes are example numbers.
Educational content only, not financial advice. Trading gold with leverage carries a high risk of loss.
Frequently asked questions
Why do traders become overconfident?
Wins feel like proof of skill and losses feel like bad luck. Over time, that uneven way of keeping score makes people believe they are better than their record shows. Simon Gervais and Terrance Odean described this kind of biased learning in a 2001 model of traders.
Is a winning streak a sign my strategy works?
Not on its own. Streaks happen by chance in any method. With a 50% win rate, there is about a 54% chance of at least one run of seven wins somewhere in 200 trades. Judge a method on a large number of trades, its expectancy and its drawdowns.
Should I increase my lot size after a winning streak?
Not because of the streak. Change size only in a scheduled review, by a small step, and based on many trades. A common approach is to keep risk as a fixed percentage of the account, so the lot size grows slowly as the account grows.
What happens after a winning streak?
Usually, the method goes back to its normal mix of wins and losses. If you raised your size during the streak, those normal losses now cost much more. Four losses at 4% risk cost about 15% of the account, versus about 4% at 1% risk.
How do I stay humble when trading is going well?
Keep the same checklist, size and session as during an average week. Review the streak’s trades: did each one follow the plan? Remind yourself that losing runs are certain to come, and plan for them while you are calm.
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