Quick definition — An R-multiple expresses a trade's realized net result as a multiple of its initial monetary risk, 1R. It allows trades of different sizes to be read on the same scale, but it does not prove skill or a statistical edge by itself.
The concept begins with a decision made before the trade. The initial 1R is the planned monetary loss derived from the entry, invalidation level, and position size. It is not the capital invested, the margin required, the worst possible loss, or a value recalculated after seeing the outcome.
Realized R-multiple = realized net P&L / planned initial risk (1R)
Net P&L uses the actual entry and exit fills and deducts explicit costs. Slippage is already reflected in actual execution prices and must not be deducted a second time. If 1R was not defined before entry or cannot be reconstructed reliably, mark the multiple as not assessable rather than inventing it.
From initial risk to realized multiple
Essential examples
With an initial 1R of $80:
| Realized net result | Calculation | R-multiple |
|---|---|---|
| −$92 | −92 / 80 |
−1.15R |
| −$40 | −40 / 80 |
−0.50R |
| +$154 | 154 / 80 |
+1.93R |
| $0 | 0 / 80 |
0R |
A loss can exceed −1R: a stop price is not guaranteed, and gaps, liquidity, or costs may worsen execution. A partial exit can instead produce fractions such as +0.35R. Round only the final result, while retaining original amounts and fills in the trading journal.
Planned and realized
| Metric | When | Question answered |
|---|---|---|
| Before the trade | What potential gross return am I comparing with 1R? | |
| Planned R-multiple | Before the trade | What result in R would the scenario produce if executed as assumed? |
| Realized R-multiple | After closing | What was the net P&L relative to the initial 1R? |
Do not substitute the target for the realized result. If the plan indicated +2R but fills, partial exits, and costs produce +1.63R, the journal must record +1.63R.
What it can compare — and what it cannot
The R-multiple reduces the effect of currency and monetary size: +1R means that the net result is numerically equal to the chosen initial risk, whether 1R is $20 or $2,000. This helps compare trades made under consistent rules.
It does not automatically make differently defined risks comparable. A 1R based on a realistic stop and estimated costs is not equivalent to an arbitrary 1R; likewise, +5R obtained from a few selected trades does not prove ability, statistical edge, future profitability, or an acceptable risk of ruin.
To analyze a series, accompany the multiples with the observation count, period, costs, mean and median, dispersion, drawdown, rule changes, and plan violations. A positive average R describes the observed sample; attributing it to an edge requires representative data, out-of-sample stability, and uncertainty analysis.
Recording procedure
- Before entry, record the timestamp, position size, planned entry, invalidation, and monetary 1R.
- At close, import every fill and reconstruct the gross P&L of the quantities actually executed.
- Deduct commissions and other applicable costs; do not count slippage already reflected in fills twice.
- Divide net P&L by the initial 1R and retain extra decimal places before rounding for reports.
- If a reliable denominator is missing, record “N/A” and correct the process from the next trade onward.
- Evaluate a complete distribution, not the best trade or the isolated total R.
Limitation — The R-multiple is sensitive to how 1R is defined. Changing the denominator after the trade, ignoring costs, or using only selected trades makes the comparison misleading.
Sources
- Van Tharp Institute, Tharp Think Trading Concepts: Expectancy — primary source for the terminology: R represents initial risk per unit, and profits and losses are related to that initial risk.
- CME Group, Proper Position Size — connects the stop, monetary value per unit, and position size in determining trade risk.
- Investor.gov, Stop, Stop-Limit, and Trailing Stop Orders — documents possible deviation between the stop price and execution price, as well as the risk that a stop-limit order may not execute.
- Investor.gov, How Fees and Expenses Affect Your Investment Portfolio — describes fees and expenses that reduce the net result.