A futures contract is a standardized agreement to buy or sell something at a fixed price on a set future date. That's the textbook line — and it makes futures sound more complicated than they are for the people actually trading them. This article explains what a futures contract is in practice: what you're really trading, what a tick is worth, what margin means, and why micro contracts are the smart way to start.
(Quick note: nothing here is financial advice — this is an explanation of how the product works.)
The honest short version
When you trade an S&P 500 futures contract, you're not buying the S&P 500. You're trading a contract whose price tracks it. If the price moves in your favor, your account is credited the difference. If it moves against you, your account is debited. That settling-up happens in cash, every day.
The word that scares people — obligation — matters much less than it sounds. Both sides of a futures contract are locked in on paper, but almost nobody holds to the end. You exit by simply closing the position, which is what virtually every day trader and swing trader does.
And no: you will not end up with barrels of oil in your garden. Index futures like the S&P can't be physically delivered at all — they settle in cash. For the few contracts that are deliverable, brokers close retail positions long before delivery ever gets close. Delivery exists as plumbing that keeps futures prices tied to the real asset. Traders never touch it.
Ticks: the unit everything is measured in
Every futures contract moves in fixed steps called ticks — the smallest allowed price change. Each tick is worth a fixed amount of money per contract. This is the first table worth memorizing:
| Contract | Name | Tick size | Tick value |
|---|---|---|---|
| ES | E-mini S&P 500 | 0.25 pts | $12.50 |
| NQ | E-mini Nasdaq-100 | 0.25 pts | $5.00 |
| MES | Micro E-mini S&P 500 | 0.25 pts | $1.25 |
| MNQ | Micro E-mini Nasdaq-100 | 0.25 pts | $0.50 |
Notice the pattern: the micros (MES, MNQ) are exactly one-tenth of the minis. Same market, same chart, same moves — one-tenth the money per tick.
This is also why "10 ticks" means something completely different per product. Ten ticks on ES is $125; on MNQ it's $5.
Margin: a deposit, not a price
A common confusion: "MES margin is $50, so the contract costs $50." It doesn't. Margin is a refundable good-faith deposit your broker holds while your position is open — it's not what you're buying.
Two layers exist. The exchange sets the full (overnight) margin, and brokers offer a much smaller intraday margin if you're flat before the close. As of mid-2026, micro contracts can often be day-traded for margins in the tens of dollars per contract, while holding overnight requires the full exchange margin — four figures for micros, five figures for the E-minis. These numbers change and vary per broker, so check yours.
Leverage: the honest part
Here's the number brokers don't put in the ad. One MES contract is $5 × the index level — for example, at an S&P level of 6,000, that's about $30,000 of exposure, controlled with a day margin of maybe $50. That is a lot of leverage.
Why does exposure matter when a point is always worth the same $5? Because markets move in percentages, not points. A normal 1% day at an index level of 6,000 is 60 points — $300 through your account on one MES. The exposure number tells you what a normal market move weighs in dollars.
Leverage doesn't improve your odds — it multiplies whatever outcome you were already going to get, in both directions. It's the main reason accounts blow up early: not bad ideas, but position sizes so large that normal market wiggles hit the pain limit before the idea can play out. The low day margin is a broker feature, not a suggestion of how much size to use.
Expiry and rollover
Index futures expire quarterly — March, June, September, December (coded H, M, U, Z). Each expires on the third Friday of its month, settled in cash.
In practice this is a non-event. About a week before expiry, volume "rolls" to the next contract, and traders simply switch to the one with the most volume — your platform shows which one that is. If you're flat, nothing happens to you at all. The only real mistake here is opening a chart of the wrong contract month and wondering why the volume looks dead.
Why micros are the smart way in
Micro contracts were made for exactly this. One-tenth the size means a mistake costs one-tenth as much: a 10-point stop on MNQ is $20 instead of $200 on NQ. The micros are among the most heavily traded products on CME, so liquidity is not a concern. The honest trade-off: commissions per dollar of exposure are relatively higher on micros — a fair price for the finer control.
A common path: one MES until consistent, then scale contract by contract. Ten MES equals one ES, so there's never a forced jump. And there's no rule that says you ever have to leave them — plenty of experienced traders stay on micros simply because the finer sizing fits their risk better.
The part that matters for order flow
All ES and MES trading happens in one place: CME's central order book. Every contract traded is recorded — real volume, a real tape, a real DOM. That's exactly the data order flow tools like the footprint and volume profile are built on, and it's the big difference with spot forex, which is decentralized and has no true volume tape. That difference is covered honestly in Futures or Forex, and it's the reason this whole site focuses on futures — if you want to learn what that volume data shows, start with how to read order flow.
One practical note: futures trade nearly 23 hours a day, but liquidity is concentrated in the US session. The overnight market is real, just thinner.
What you need
A futures broker for the account, and a platform to chart and trade on. ATAS is built for futures order flow — footprint, volume profile, DOM — and has a free trial to look around. Setting it up is covered step by step in How to Set Up ATAS for Futures.
The bottom line
A futures contract is a standardized bet on price difference, settled in cash daily, measured in ticks with fixed dollar values, held with a deposit called margin. Micros made the product learnable — same market at one-tenth the cost per mistake. The one thing to respect from day one is leverage: it's the feature and the danger in the same number.