Measuring trading performance
Guides on the metrics that tell you whether you have an edge — and the journaling habits that keep you honest about it.
How many trades before you know a strategy works
Everyone repeats the 100-trade rule; nobody derives it. Here is the arithmetic that turns your win rate and R-multiples into the sample size you need.
8 min read
How long a losing streak is normal at your win rate
You just lost six trades in a row. Here is the math that tells you whether that is ordinary variance at your win rate, or a strategy that has actually broken.
10 min read
What to Actually Record in a Trading Journal
Most trading journals fail because they record the wrong things. Here are the fields that produce answers, the ones that waste your time, and why.
5 min read
Profit Factor: What It Tells You, and What It Hides
Profit factor is the fastest read on whether a trading system makes money. It is also easy to misread on a small sample. Here is how to use it properly.
4 min read
R-Multiple: How to Measure a Trade Without Looking at P&L
R-multiple turns every trade into a comparable unit of risk. Here is how to calculate it, how to read it, and how to use it to tell edge apart from variance.
4 min read
Weekly Insights
One email a week on measuring trading performance. No account required.