Quick answer: Divide your planned dollar risk by the estimated risk of one futures contract, then round down to a whole contract. The contract multiplier matters: the same price stop creates ten times the gross dollar exposure in ES versus MES, or NQ versus MNQ.
This original CandleChasers guide uses hypothetical USD examples. The risk percentages and cost allowances illustrate arithmetic, not recommended trading settings.
ES, MES, NQ and MNQ: points are not ticks
A point is a one-unit change in the quoted index price. A tick is the smallest permitted price change for the outright contracts shown below. Each uses a 0.25-point tick, so one point equals four ticks. Dollar values differ by contract.
| Symbol | Contract | Dollars per point | Tick size | Dollars per tick |
|---|---|---|---|---|
| ES | E-mini S&P 500 | $50 | 0.25 points | $12.50 |
| MES | Micro E-mini S&P 500 | $5 | 0.25 points | $1.25 |
| NQ | E-mini Nasdaq-100 | $20 | 0.25 points | $5.00 |
| MNQ | Micro E-mini Nasdaq-100 | $2 | 0.25 points | $0.50 |
For example, a 20-point move is 80 ticks. It represents $400 per NQ contract or $40 per MNQ contract before costs. Confusing 20 points with 20 ticks understates that movement by a factor of four.
Calculate risk before choosing the number of contracts
- Dollar risk budget: account equity × example risk percentage ÷ 100.
- Stop ticks: absolute entry-to-stop distance in points ÷ tick size.
- Estimated risk per contract: stop ticks × tick value + round-trip fees + adverse execution allowance.
- Whole contracts: round down dollar risk budget ÷ estimated risk per contract.
Set the stop from the research rules first. Moving it closer solely to fit more contracts changes the trade being evaluated. Use valid tick increments. If estimating a distance between increments, rounding the assumed distance outward avoids understating it.
The adverse execution allowance is a hypothetical total for entry and exit slippage. It is additional to the entry-to-stop movement; count each cost only once. Actual fills can be worse than the allowance. A stop order does not guarantee a maximum loss.
Open the futures position size calculator → It accepts stop distance in ticks and a round-trip cost per contract. To reproduce a cost-adjusted example below, include the stated dollar slippage allowance in that cost field along with fees. The calculator does not check margin or whether a contract is suitable for an account.
Worked example: a 6-point stop on ES versus MES
Assume a $10,000 account and an illustrative 0.5% risk budget: $50. A 6-point stop equals 24 ticks.
| Calculation | ES | MES |
|---|---|---|
| Stop movement, before costs | 24 × $12.50 = $300 | 24 × $1.25 = $30 |
| Fits $50 before costs? | No | One contract |
For the MES calculation, now assume $2 round-trip fees and two ticks of total adverse slippage. The allowance is 2 × $1.25 = $2.50. Estimated risk becomes $30 + $2 + $2.50 = $34.50 per contract.
Round down $50 ÷ $34.50: one MES. Two would produce $69 of estimated risk, above this example budget. These fee and slippage assumptions are illustrative, not a broker quote.
Try the calculator: account 10000; risk 0.5%; stop 24 ticks; tick value 1.25; combined round-trip cost allowance 4.50. Expected result: one contract and $34.50 estimated risk.
Worked example: a 20-point stop on NQ versus MNQ
Use a separate hypothetical $10,000 account example with a 1% budget, or $100. A 20-point stop is 80 ticks. One NQ risks $400 before costs, so it does not fit. One MNQ risks $40 before costs.
Assume $2 round-trip fees per MNQ and two ticks of total adverse slippage, worth $1. Estimated risk is $40 + $2 + $1 = $43 per MNQ. Round down $100 ÷ $43: two MNQ contracts, with $86 estimated total risk. Three would be $129.
Try the calculator: account 10000; risk 1%; stop 80 ticks; tick value 0.50; combined round-trip cost allowance 3.00. Expected result: two contracts. The 1% example is a different assumption from the MES example, not a suggestion to increase risk for Nasdaq trades.
Use the futures profit/loss calculator to explore a proposed exit with the correct contract, direction and quantity. A calculated target profit does not establish how likely the target is to be reached.
Margin is a separate constraint
Margin is collateral required to carry the position. It is not the planned loss at your stop, and a broker’s permitted quantity is not a risk-management target. Exchange and broker requirements can change; intraday terms may differ from overnight requirements.
A position must pass both checks: it must fit the research risk budget and the applicable funding requirements. The sizing calculator handles the first arithmetic estimate only. Confirm current requirements, available equity, contract expiry, session rules and liquidation policies with the broker before any live use.
Notional exposure is another useful measurement: futures price × dollars per point × contracts. For example, MES at a hypothetical 6,000 has $30,000 notional exposure per contract. That is neither a required cash purchase nor a maximum possible loss.
When zero contracts is the useful answer
If one contract exceeds the budget, rounding up defeats the constraint. A smaller contract may offer finer sizing, but if even one micro does not fit, this particular setup has no valid whole-contract size under those assumptions. A simulated observation or no trade is a coherent result.
Ten micro contracts have the same gross index exposure as one corresponding E-mini. They need not have the same total commissions, order-book liquidity, margin treatment or execution quality. Smaller units help sizing granularity; they do not remove leverage.
Check combined exposure, not just each ticket
Two separately sized trades can depend on the same market move. ES and NQ can both react to broad equity-market news. Adding their planned stop losses describes an assumption, not a guaranteed portfolio loss cap: gaps, slippage and simultaneous moves can produce larger losses.
Before accepting a size, record existing positions, pending orders and any daily or account-level constraints. Recalculate after equity changes rather than assuming yesterday’s dollar budget still applies.
A repeatable sizing checklist
- Confirm the exact contract, expiry and current exchange specifications.
- Write the entry, invalidation price and stop distance in both points and ticks.
- Set an explicit hypothetical dollar budget independent of broker buying power.
- Include round-trip costs and a clearly labeled execution allowance.
- Round quantity down, then check funding and combined exposure.
- Record the assumptions and compare estimated versus realized execution in your research log.
Futures position-sizing questions
How much is one point on NQ or MNQ?
NQ is $20 per point per contract; MNQ is $2. Both use a 0.25-point outright tick, worth $5 and $0.50 respectively.
How many MES contracts equal one ES?
Ten MES have the same gross S&P 500 index exposure as one ES. Compare total costs and execution separately.
Can I size from margin alone?
Margin determines a funding requirement. It does not measure the distance to your stop or the loss if execution is worse than expected. Check funding and risk separately.
Does a stop guarantee the calculated loss?
No. The calculation assumes a particular fill and cost allowance. Gaps, liquidity conditions and order execution can cause losses beyond that estimate.
Continue the calculation
- Futures position size calculator – convert a budget and stop into whole contracts.
- Futures profit/loss calculator – compare contract-specific price moves.
- Expectancy, risk and position sizing – distinguish payoff arithmetic from evidence of an edge.
Sources and scope
Contract multipliers and ticks were checked against CME Group: equity-index values and ticks, NQ specifications, MES specifications and MNQ specifications. Verify current terms before use. Worked examples and cost assumptions are original educational illustrations, not exchange or broker recommendations.
Risk disclosure: Futures are leveraged instruments and can produce losses exceeding deposited funds. This guide is educational, does not recommend a trade or risk allocation, and provides no guarantee of performance. CandleChasers’ daily stock backtester does not reproduce these intraday futures execution examples.