Position sizing with ES and MES
Contracts = risk budget ÷ (stop distance in points × dollars per point). If the answer is below 1, the trade is too big.
Leverage risk. Futures losses can exceed your margin deposit. Contract specs, margins, sessions and funded-account rules here are illustrative; verify current specifications with the exchange, your broker or the provider.
The formula
Risk per contract = stop distance (points) × multiplier, plus estimated slippage and commissions. Contracts = floor(risk budget ÷ risk per contract).
Futures are indivisible: you cannot trade 0.4 of an ES. If one standard contract exceeds your budget, use the micro or skip the trade. Micros exist precisely to make sizing possible for smaller accounts.
Worked example
$20,000 account, 1% risk, 12-point stop (illustrative specs)
- Budget = $200.
- ES risk per contract = 12 × $50 = $600 > $200 → zero ES contracts.
- MES risk per contract = 12 × $5 = $60 → $200 ÷ $60 = 3.33 → 3 MES.
- Actual risk = 3 × $60 = $180. Add illustrative round-trip costs of about $1.50 per contract → ~$184.50.
- Add a 1-point slippage allowance: 3 × $5 = $15 more → ~$199.50, still within budget.
Size from the stop; let the micro/standard choice follow.
Common misconceptions
“One contract is the minimum, so risk whatever one contract needs.”
If one contract exceeds your budget, the correct size is zero.
“A tighter stop is a fix for oversizing.”
Stops belong where the idea is invalidated; shrinking them to fit size just gets you stopped out by noise.
Checkpoint