Micro vs Mini Futures: Which to Trade in a Prop Challenge

The contract you trade is the second-most important decision after account size. A trader who's perfectly disciplined on a $25K can still blow up in 20 minutes if they pick the wrong contract.

This is a working trader's breakdown of micro vs mini futures in a prop challenge: what each one is, what it costs you per tick, and which one fits the account size you bought.

What a mini and a micro actually are

The CME runs two parallel families of equity index, energy, metal, and FX futures:

• E-mini contracts (ES, NQ, RTY, YM): the standard size that's been around since the late 1990s.
• Micro E-mini contracts (MES, MNQ, M2K, MYM): one tenth the notional and one tenth the dollar value per tick.

Same underlying, same charts, same hours, same liquidity profile. Different size on each tick.

Tick value: dollars per point

The number that decides everything is the dollar value of one tick.

• ES: 1 tick = 0.25 points = $12.50.
• MES: 1 tick = 0.25 points = $1.25.
• NQ: 1 tick = 0.25 points = $5.
• MNQ: 1 tick = 0.25 points = $0.50.

If you take a 4-point loss on 1 ES, that's $200. The same 4-point loss on 1 MES is $20. Same trade, different bill.

Why micros are the sane way to start a $25K

The $25K Rev One account has a $1,000 max loss limit (4% of $25,000). That's 800 ticks of MES on a 1-lot.

On a 1-lot of MES with a 60-tick stop, you risk $75. You have thirteen of those before you hit MLL. That's a workable runway.

On a 1-lot of ES with a 60-tick stop, you risk $750. That's three quarters of the MLL on one trade. Two bad fills and you're out.

The $25K rules allow up to 2 full or 20 micro contracts. The math says you should not be using more than one ES on this account size at all.

When to step up to minis

Two conditions, both required:

• You've traded a strategy on micros for at least 30 sessions and know your average loss per trade in dollars.
• That dollar number, multiplied by a position size in minis, fits inside 0.5% to 1% of your account balance.

On the $100K Rev One, that's $500 to $1,000 per trade. One ES with a 40-tick stop is $500. That fits. One ES with a 100-tick stop is $1,250. That doesn't.

For more on the right risk-per-trade math, see how to pass a futures prop firm challenge in 2026.

Contract caps on Rev One

The contract caps scale with size:

A few things worth flagging:

• The "micro" cap is set generously, because trading 60 micros at once is not the same as 6 minis. The dollar exposure is identical, but you pay commission on ten times as many contracts.
• The full-contract cap is the leash. On the $25K, two ES is the upper bound, not a target.
• Once you're funded, each payout request is capped as well: 50% of your cycle profit, up to the cycle cap for your size ($1,000 on the $25K, $3,000 on the $150K). That caps what you can take out in one go, not what you can make.

Commissions: the part nobody factors in

Rev One charges $0.50 to $2.40 per side, per contract, depending on the instrument. The rate is on the rules page and it's the same on every account size.

The word that matters there is "per contract". Ten MES is the same notional as one ES, but it pays ten commission legs on the way in and ten on the way out. Run the 20-micro cap on a $25K and a single round trip is 40 legs.

For most traders, this means: scale into minis once you can trade 1 to 2 minis at your dollar risk size, instead of running 20 micros.

The honest advice

If you're under 30 sessions on micros, stay on micros. If you've graduated, scale to minis at the size where one mini contract is your normal trade.

The point of a prop challenge is not to feel rich on big size. It's to pass a math test you set yourself. The contract is part of the math.

For where most challenges actually break, see 5 mistakes that fail 80% of prop firm challenges. For the drawdown rule that interacts with all of this, see trailing vs end-of-day drawdown.

Right contract, right size, right rules. That's the whole job on day one.