How to size micro futures (MNQ) for a small or funded account

A plain-English method for sizing Micro E-mini Nasdaq-100 (MNQ) futures from your loss limit, including how prop-firm drawdown rules (daily loss, trailing and end-of-day drawdown) change the math.

Start from the loss you can take, not the profit you want

Most sizing mistakes come from working backwards from a profit target. A sturdier approach works forwards from risk: decide how much you can afford to lose on one trade and over a bad stretch, then size so that one bad stretch cannot end your account. Micro futures exist precisely so smaller accounts can do this with finer steps.

The contract facts

The Micro E-mini Nasdaq-100 (MNQ) is one-tenth the size of the E-mini Nasdaq-100 (NQ):

So a 25-point move is $500 on one NQ and $50 on one MNQ. Commissions and fees are charged per contract, so as a share of the move they cost more on micros. Check your broker's current contract specs, fees and margin, because these vary and change.

Per-trade sizing

The basic formula:

Contracts = risk per trade in dollars ÷ (stop distance in points × $2), rounded down.

Worked example (illustrative only): a trader risks $100 on a trade with a 20-point stop. Each MNQ loses 20 × $2 = $40 if the stop is hit, so $100 ÷ $40 = 2.5, rounded down to 2 MNQ. If the stop is 40 points, the same $100 allows only 1 MNQ. A wider stop means fewer contracts, not more risk.

Two cautions. Stops are not guaranteed: in fast markets or around news, fills can be worse than the stop price (slippage). And add fees to the loss per contract so they do not quietly push you over your limit.

Sizing for a bad stretch, not one trade

A single-trade limit is not enough. Losing streaks happen in any approach, and they are usually longer than people expect. A common way to think about it:

• Decide the most you can accept losing over a drawdown, for example a fixed slice of the account.
• Estimate how many losses in a row your approach could plausibly take. A backtest's worst drawdown is a starting point, never a ceiling.
• Size so that the streak fits inside the drawdown limit with room to spare.

If you follow a tested strategy, size from its worst historical drawdown per contract, then assume live trading can be worse. The position-sizing calculator shows this method using each Stacked Edge strategy's backtest drawdown per contract.

Funded (prop-firm) accounts: the rules change the budget

Evaluation and funded accounts usually advertise a nominal account size, but what you can actually lose is set by the firm's rules. Your real risk budget is the distance to the nearest rule, not the account size. Common rule types (every firm words them differently, so read your own firm's terms):

• Daily loss limit: a maximum loss in one day. Hitting it can end the day or the account.
• Static maximum drawdown: a fixed floor below the starting balance.
• Trailing drawdown: the floor rises as your balance makes new highs, often until it reaches a set level. Some firms trail on intraday unrealized highs, which means an open profit that comes back can still move your floor up.
• End-of-day drawdown: the floor only updates on closing balances, which is usually more forgiving intraday.
• Contract limits and scaling plans: caps on how many contracts you may hold, sometimes rising as the account grows.
• Consistency rules: limits on how much of your profit can come from a single day.

A worked prop-firm example (illustrative)

Suppose an account has a $2,000 trailing drawdown and a $1,000 daily loss limit. The distance to the floor on day one is $2,000, not the nominal account balance. If you want to survive, say, eight losing trades in a row before hitting the floor, your risk per trade is about $2,000 ÷ 8 = $250. With a 25-point stop, each MNQ risks $50, so $250 ÷ $50 = 5 MNQ at most, and fewer if you add fees and slippage. One full NQ at that stop would risk $500, a quarter of the whole drawdown on one trade.

Then check the daily limit: four losses at $250 reach $1,000, so the daily rule may stop you before the streak plays out. Size so that a normal bad day stays well inside the daily limit.

If the drawdown trails intraday, remember that giving back open profit can tighten your floor. Many traders reduce size or take partial profits when the floor is close, and recalculate their budget each day from the current distance to the floor.

A short checklist

1. Write down your per-trade and per-day loss limits in dollars.
2. For funded accounts, use the distance to the nearest firm rule as your budget.
3. Compute contracts from the stop distance and round down.
4. Include fees and allow for slippage.
5. Recheck the size each day as your balance and floor change.

What this guide is not

This is a method for thinking about risk, not a recommendation to trade or a promise of any result. The numbers above are made-up examples to show the math. Futures can lose more than you expect, quickly.

Learn with real reference levels

The free Stacked Edge daily brief publishes NQ reference levels each trading day, so you can practise planning stops around levels without risking money.

Related reading

• Position sizing and the calculator
• How much can you lose on one NQ, ES or GC contract?
• Why max drawdown matters more than net profit
• NQ levels explained: prior-day high/low, overnight range and VWAP

Education only, not financial advice. Trading futures risks loss. Examples are illustrative. No results are shown or implied by this article. Stacked Edge is not a registered investment advisor or commodity trading advisor.