Risk Academy
Position Sizing: The 1R System
Entries, exits, direction — the market gets a vote on all of them. Position size is the one decision that is 100% yours. Which makes it strange that most traders never actually make it: they trade “their usual” 2 lots, on every setup, at every stop distance — and call the result luck.
The inversion
The whole system is one sentence: decide the dollars first, place the stop where the chart says, and let the size be whatever the division produces. That dollar amount is your R — the unit every future decision gets measured in.
The worked math — funded-account version
$50,000 funded account, $3,000 trailing drawdown. Your real account is the $3,000 (see the $100K guide) — so 1R at 2% = $60 per trade.
Setup on the S&P: the chart says the stop belongs 8 points away. Full ES contract: 8 × $50 = $400 risk — the formula says you cannot afford even one. Micro (MES): 8 × $5 = $40 → 1 micro, comfortably inside 1R.
Yes — one micro. If that answer feels insulting, notice what just happened: the formula told you the truth about your account before the market charged you for the lesson. Fifty losing micros stand between you and a breach. At “your usual 2 ES”, the number was four.
Same setup, three stops — watch the size move
This is the part that rewires intuition: a wider stop doesn't mean more risk — it means a smaller position at the same risk. 1R = $60 on gold micro futures ($10/point):
- Tight scalp, $2 stop → $20 per contract → 3 contracts.
- Intraday swing, $6 stop → $60 per contract → 1 contract.
- Wide structure stop, $12 stop → $120 per contract → half-size or skip: the account can't afford this trade at 1R.
Every trade risks the same $60 — so a loss is always exactly 1R, a 2:1 winner is always +2R, and your P&L becomes a clean sequence of R-multiples instead of random dollar noise. That's the language expectancy speaks (next guide).
Where traders fall
- Fixed contracts, variable stops: '2 lots always' means the tight-stop trade risks $80 and the wide one $400 — same conviction, 5× the risk, decided by nobody.
- Sizing off the sticker balance instead of the drawdown — the funded-account classic (three losers to breach instead of fifty).
- Letting the platform's margin allowance set the ceiling. Margin measures the loan, not the danger.
- Sizing up after wins and after losses — for opposite emotional reasons, with the same mathematical result.
Make it a system tonight
- Fix your R: 1–2% of your REAL account (the drawdown on funded accounts). Write the dollar number where you can see it.
- Pre-compute a size card for your instruments: at $60 R — MES: $40/8pt stop, MNQ: $2/pt, gold micro: $10/pt. No mid-trade arithmetic.
- The skip rule: if the chart's stop makes size zero, the trade is a skip, not a 'mental stop'.
- Audit last month: multiply each trade's stop distance by its size. If the dollar risk varied more than 2×, you weren't sizing — you were guessing.
That size card is now a tool
Mini/micro contracts, broker lot steps, actual risk after rounding — computed live.
R is the language — now learn the grammar
Educational content only — not financial advice.