Micros or Minis: Sizing a Futures Trade With Micro Contracts

For years, the smallest way to trade an S&P 500 future was the E-mini, where a single quarter-point tick is worth $12.50. That's a lot of dollars per tick for a trader with a small account, a tight daily loss limit, or a strategy that needs a wide stop. A trader who wanted to risk $100 on a trade with a 4-point stop simply couldn't: one contract already risked $200.

Micro contracts solved that. They track the same markets at one-tenth the size, so the sizing question changes from "one contract or none" to "how many." This article covers the contract specs, how to size a trade from your stop and your budget, when micros are the better tool and when minis are, and the costs that come with trading ten small contracts instead of one large one.

The Contracts, Side by Side

CME Group describes its Micro E-mini equity index futures as one-tenth the size of the corresponding E-mini contracts, and its micro energy and metals contracts follow the same one-tenth relationship to the standard contracts. The table below lists the most commonly traded pairs. Specs are from CME Group; always check the exchange's current contract specifications before trading.

Market	Micro	Micro size	Micro tick	Larger contract	Larger size	Larger tick
S&P 500	MES	$5 × index	0.25 pt = $1.25	E-mini S&P 500 (ES)	$50 × index	0.25 pt = $12.50
Nasdaq-100	MNQ	$2 × index	0.25 pt = $0.50	E-mini Nasdaq-100 (NQ)	$20 × index	0.25 pt = $5.00
Russell 2000	M2K	$5 × index	0.10 pt = $0.50	E-mini Russell 2000	$50 × index	0.10 pt = $5.00
Dow Jones Industrial Average	MYM	$0.50 × index	1.00 pt = $0.50	E-mini Dow	$5 × index	1.00 pt = $5.00
WTI crude oil	MCL	100 barrels	$0.01/bbl = $1.00	Crude oil (CL)	1,000 barrels	$0.01/bbl = $10.00
Gold	MGC	10 troy oz	$0.10/oz = $1.00	Gold (GC)	100 troy oz	$0.10/oz = $10.00

Two things to notice:

The price is the same; the dollars are not. MES and ES quote the same index level and move tick for tick. A 4-point move is 16 ticks on both. On ES that's $200 per contract; on MES it's $20.

Tick size can differ between markets, not between the pair. MES and ES both tick in quarter points; MCL and CL both tick in cents. The difference is only the multiplier. That makes converting between them simple: ten micros are the same exposure as one of the larger contracts.

Sizing From Your Stop

The core sizing formula is the same for any futures contract:

Risk per contract = stop distance in ticks × tick value

Contracts = risk budget for the trade ÷ risk per contract, rounded down

The stop comes from the chart: where the trade is wrong. The risk budget comes from your plan: how much you'll lose if it is. The contract count is what's left to decide, and it's the only one of the three you should adjust to make the trade fit.

The mistake is doing it the other way round: choosing the size you'd like to trade, then squeezing the stop until the dollar risk looks acceptable. A stop placed to fit a size, rather than placed where the trade is wrong, gets hit by ordinary noise.

Worked example: S&P 500

The numbers below are invented round figures, used as an illustration.

A trader's plan risks $150 per trade. Today's setup on the S&P 500 needs a 6-point stop.

• 6 points = 24 ticks.
• ES: 24 × $12.50 = $300 per contract. Even one contract is twice the budget. The trade doesn't fit.
• MES: 24 × $1.25 = $30 per contract. $150 ÷ $30 = 5 MES.

On a quieter day the same setup needs only a 3-point stop: 12 ticks, $15 per MES. The same $150 budget now allows 10 MES, the same exposure as one ES. The risk in dollars didn't change. The size did, because the stop did.

Worked example: Nasdaq-100

Same budget, $150. The Nasdaq-100 moves more points per day than the S&P 500, so stops are measured in larger point distances. The setup needs a 25-point stop.

• 25 points = 100 ticks.
• NQ: 100 × $5.00 = $500 per contract. Doesn't fit.
• MNQ: 100 × $0.50 = $50 per contract. $150 ÷ $50 = 3 MNQ.

Worked example: crude oil

Same budget. The crude setup needs a 20-cent stop.

• 20 cents = 20 ticks.
• CL: 20 × $10.00 = $200 per contract. Doesn't fit.
• MCL: 20 × $1.00 = $20 per contract. $150 ÷ $20 = 7.5, rounded down to 7 MCL, risking $140.

Rounding down matters. Rounding up to 8 would risk $160, over budget. It's a small difference on one trade and a meaningful one over a hundred.

What Micros Give You

Granularity

With only minis, a trader's size can be 0, 1, 2 or 3 contracts: each step is a large jump in risk. With micros, size can track the stop and the budget in steps one-tenth as large. That means you can take the trade the chart actually calls for, with the stop where it belongs, at the risk your plan allows.

Partial exits

A single ES contract can only be exited all at once. Ten MES contracts can be scaled out: a few at the first target, more at the second, the rest on a trailing stop. If your strategy depends on taking partial profits, micros let you do it at sizes where minis wouldn't divide.

Room inside a small daily limit

A daily loss limit of $300 is a single full ES loss with a 6-point stop. With 2 MES at the same stop, $60 risk per trade, it's five. The micro trader gets more attempts at the same daily risk, and less chance of one bad trade deciding the day. (For setting the limit itself, see daily loss limits that stick.)

Adjusting size to conditions

A sensible response to wider ranges, around an economic release or after a large opening move, is to widen the stop and cut size so dollar risk stays the same. With micros, that adjustment can be smooth instead of a choice between your full size and nothing. See trading around economic releases.

A way to practice at real stakes

Trading a strategy live at small size is a different experience from trading it on a simulator. Micros let a trader take real fills, real slippage and real emotional consequences at a scale where the mistakes are survivable.

What Micros Cost You

Fees are usually per contract

Commissions and exchange fees are generally charged per contract, and a micro's fees are usually well above one-tenth of a mini's. Ten micros usually cost more in fees than one larger contract, for the same exposure.

Illustration, with invented numbers: suppose your all-in cost per side is $0.60 per micro and $2.50 per mini. A round trip on 10 MES costs $12.00; a round trip on 1 ES costs $5.00. For the same exposure, the micros cost $7.00 more per trade. Over 300 trades a year, that's $2,100. Check your own fee schedule; the ratio is what matters.

Once a trader regularly trades ten or more micros of the same market, the larger contract is usually the cheaper way to hold the same exposure.

Fees are a bigger share of a small trade

Even at small size, fees matter more on micros relative to the trade. On a single MES, $1.20 round trip is nearly a full tick of the $1.25 tick value. A strategy that targets 4 ticks on MES pays a much larger share of its gross profit in fees than the same strategy on ES. Measure it.

Separate order books

Micros and their larger counterparts are separate contracts with separate order books. Check the depth on the contract you actually trade, at the times you trade it. A large micro order may not fill as cleanly as the same exposure in the larger contract.

Slippage scales with size

One tick of slippage on 10 MES costs the same as one tick on 1 ES: $12.50. Micros don't reduce slippage in dollars for the same exposure; they reduce it only because they let you trade less exposure. Our article on the real cost of slippage covers how to measure yours.

Micros on a Prop Account

Prop firms treat micros in different ways, so this is one of the first rules to read in your firm's rulebook. Common patterns:

• Contract caps that count each micro as a fraction of a mini, so ten micros use the same allowance as one mini.
• Contract caps that count each micro the same as any other contract, which makes micros far less flexible on that account.
• Separate caps for micros and minis.
• Scaling plans that start an account at a small cap and raise it as the account grows.

The trailing drawdown on a prop account usually leaves less room than a trader would like, which makes micros especially useful there. When your room above the floor shrinks, your size should shrink with it, and micros let you shrink it in small steps. See two layers of risk on a prop account.

Moving Up From Micros

A common progression is to start in micros and move to minis as the account grows. The jump from 9 micros to 1 mini is small; the jump from "I trade micros" to "I trade 3 minis" can be enormous. Move up when the numbers say so, not when confidence does.

A rule that keeps the move grounded: trade the larger contract when your normal risk budget, at your normal stop, buys ten or more micros. At that point the exposure is the same and the fees are lower. Below that point, micros give you sizing the mini can't.

Mixed positions

Some traders hold a mini plus a few micros to fine-tune size: 1 ES plus 4 MES is the same exposure as 14 MES. That's fine, but know the equivalent before you enter, and make sure your risk, your platform's position display and your firm's contract cap all count it the same way you do.

Common Sizing Mistakes

Sizing to the account, not the stop. "I have a $25,000 account, so I trade 5 MES." The stop distance changes with conditions; the risk per trade then changes without your noticing. Size from the stop every time.

Moving the stop to fit the size. Covered above, and the most common error. The stop is where the trade is wrong; size follows.

Size drift after wins and losses. Many traders add contracts after a run of winners and add more after a loss to "get it back." Both quietly change the risk the plan was built on. Our article on position sizing drift covers how to spot it in your own trades.

Forgetting the fee per contract. A micro strategy that looks profitable before fees can be flat or worse after them.

Confusing micros with minis on the order ticket. MES and ES share a price. An order meant for 5 MES sent as 5 ES risks ten times the plan. A maximum size per order, set below what would ever be a mistake, catches it.

Practical Checklist

Before you size a trade:

• Know the tick value of the exact contract you're trading: micro or larger, and its multiplier.
• Place the stop where the trade is wrong, from the chart, before thinking about size.
• Calculate risk per contract: stop ticks × tick value.
• Divide your risk budget by it and round down.
• Check the fees per contract and what share of your target they take.
• Check your firm's contract cap and how it counts micros, if you trade a prop account.
• Shrink size, not stop, when ranges widen or your room shrinks.
• Set a maximum size per order that catches a micro-for-mini mistake.
• Move up to the larger contract when your normal budget buys ten or more micros at your normal stop.

The Bottom Line

Micro futures don't change the market; they change the unit you trade it in. The same S&P 500, Nasdaq-100, crude or gold price, at one-tenth the dollars per tick, turns sizing from an all-or-nothing choice into a calculation you can do on every trade: stop, risk per contract, budget, contracts.

That precision is the real benefit. It lets the stop sit where it belongs and the size follow from it. The trade-off is fees, which grow with contract count, and the point at which they make the larger contract the better choice is a number you can work out for yourself.

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NexTick360 refuses an order over the maximum size you set, on the trade panel and the DOM, and keeps today's loss, closed and open, beside your chart against the daily loss limit you set. See Intelligence