How long a losing streak is normal?
Even a real, winning edge goes cold for stretches. Set your edge, run a trader, and watch how many losses in a row happen by pure chance — before you blame the system.
A losing streak is not a broken system — it's the expected variance of a real edge. The red bar marks your run against 500 simulated traders with the identical win rate: a cold stretch that looks catastrophic is usually sitting in the fat middle of that distribution. This is descriptive — it shows what a genuine edge feels like along the way, not what your next trade will do.
A losing streak is not a broken system
When a strategy loses six, eight, ten times in a row, the instinct is to conclude it stopped working. Usually nothing stopped working. Long losing runs are the ordinary, expected texture of a real edge — they are what variance looks like from the inside, and every genuine strategy produces them.
The intuition is simple. With a 55% win rate, a loss is nearly a coin flip. Ask how often a coin gives you eight tails in a row across a couple of hundred flips, and the answer is: routinely. Your equity curve does the same thing — it just hurts more because it's your money.
What the simulation shows
Set your real edge and a number of trades, and the lab plays out one trader: the line is the running equity, the red segment is the longest stretch of losses that happened purely by chance. Then it does something a single backtest can't — it runs 500 traders with the identical edge and plots how long each one's worst streak got.
- The red bar marks your run against that crowd.
- A streak that felt catastrophic almost always lands in the fat middle of the distribution — common, not exceptional.
- Press "Run another trader" a few times: the worst-streak number jumps around wildly, but it is almost never zero.
With a genuine 55% edge over 200 trades, the average worst losing streak is around six in a row, and stretches of ten are well inside normal. The edge is intact the entire time.
Why this matters for trading a signal
Knowing the expected shape of a cold stretch is what lets you size positions to survive one — and what stops you from abandoning a working tool at precisely the wrong moment. This lab is descriptive: it shows what a real edge feels like along the way, not what your next trade will do.