Why a 90% Win Rate Can Still Blow Your Account
spot on, cracking open why those sky-high win rates are usually just a ticking time bomb. grinding out tiny wins all week only to get totally cleaned out by one absolute bloodbath of a drawdown is classic.
Agree with this. Win rate can be very misleading. I prefer to see how much a strategy lose when it's wrong, not only how often it wins. 80-90% win rate looks nice, but one big loss can destroy many small profits. Expectancy and risk management matter much more for me.
ZayanFX posted:A trader shows up with a strategy boasting a 90% win rate, and it sounds unbeatable — until you look at the risk-reward ratio behind it. A common pattern: small, frequent wins of $10-20, offset by rare losses of $300-500. The win rate looks impressive on paper, but the account is one bad week away from erasing months of gains.
Win rate alone tells you almost nothing about a strategy's actual viability. What matters is the relationship between average win size, average loss size, and how often each occurs — expressed as expectancy, not just a percentage.
A quick gut-check: take your last 30 trades, calculate average win $ and average loss $, then multiply by their respective frequencies. If the number is barely positive or negative despite a "high win rate," the strategy has a structural problem that a few more winning trades won't fix.
High win rate strategies aren't inherently bad — grid and martingale-style systems often produce them — but traders need to understand exactly what tail risk they're carrying in exchange. What's the real expectancy behind your current strategy?
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