Risk
R-Multiple
(R)1R = the dollar amount you risked on a trade. A 2R win = 2× your risk.
How it's used correctly
Log every trade in R, not dollars. Compute expectancy as average R per trade over ≥ 30 trades.
Common mistake
Counting partial closes as 'wins' when they're below 1R. The honest log uses fractional R for early exits.