Crypto spot trading is about owning the coin. This guide covers something else: perpetual futures, which are contracts tied to a market price instead of the asset itself. You will compare them with quarterly futures and spot, then see how leverage, margin, funding, and liquidation change the risk. To follow along in a testnet demo, you can open the play-money terminal, check the market list, review a play-money portfolio, and inspect the play-money wallet. On ZK Futures, every balance is play money, and a new account starts with 1,205.50 test USDT.
What a perpetual future is
A perpetual future is a futures contract with no expiration date, so the position can stay open until the trader closes it or it is liquidated.
In crypto markets, perpetuals are commonly quoted against USDT, which means profit and loss are tracked in USDT terms instead of through delivery of the underlying asset. A long position gains value when the market price rises and loses value when the market price falls. A short position gains value when the market price falls and loses value when the market price rises.
That is the first big shift for a spot trader. In spot trading, the trader buys or sells the asset itself. In a perpetual future, the trader holds a contract tied to the asset’s price rather than the asset itself.
The mark price is the reference price used to value the position and determine unrealized PnL and liquidation conditions. Unrealized PnL means the gain or loss on an open position before it is closed. Because the contract stays open without a maturity date, it is built to trade continuously rather than end on a set future date.
This is the main structural difference from dated futures. A dated futures contract has a maturity date. A perpetual does not, so the position can remain open as long as margin conditions are met and the trader chooses not to close it.
A simple comparison helps:
- Buying spot BTC means owning BTC.
- Opening a BTC perpetual means holding a contract that rises or falls with BTC’s price.
For a first-time derivatives trader, that difference matters more than the familiar market names on the screen.
How perpetuals differ from quarterly futures
A quarterly future is a futures contract with a fixed expiration date, often at the end of a calendar quarter.
That creates the clearest contrast with a perpetual future. A quarterly contract ends on a set date, while a perpetual future has no expiry. Expiry simply means that, at expiration, the quarterly contract stops trading and is settled according to its rules.
For a trader, that changes what needs attention. With quarterly futures, time matters because the contract has a scheduled end. A position is not just about price direction but also about how long remains until expiry. With perpetuals, there is no settlement date to count down to, but there is an ongoing cost mechanism instead.
Funding is a periodic payment exchanged between longs and shorts to help keep a perpetual contract aligned with the underlying market. At a positive funding rate longs pay shorts, and at a negative funding rate shorts pay longs.
The arithmetic is small in percentage terms but still matters because it repeats. A funding rate of 0.01% on a position worth 10,000 USDT means a payment of 1 USDT per settlement.
The timing also depends on the venue. Many exchanges settle funding every 8 hours, and some every hour. So while quarterly futures make a trader think about expiry, perpetuals replace that calendar deadline with recurring funding and the need to monitor it over time.
How perpetuals differ from spot trading
Spot traders start from a simple structure: one asset is exchanged for another, and the trader then holds the asset. If you buy BTC in spot, you own BTC after the trade. The position’s value can rise or fall, but the trade itself is still about owning the coin.
A perpetual future works differently. It does not require owning the underlying coin to take a view on price direction. Instead, the trader opens a contract whose value moves with the market price.
Leverage lets a trader control a larger position value than the margin posted for that position. Margin is the amount set aside to support an open leveraged position. Isolated margin means only the margin assigned to that position stands behind it rather than the whole account balance.
In this demo, initial margin equals position value divided by leverage.
That one rule changes how sensitive the position becomes to price moves:
- With 10x leverage, a 10% adverse move uses up the initial margin.
- With 100x leverage, a 1% adverse move does.
- With 2x leverage, a 50% adverse move does.
This is the practical shift that matters most for a spot trader. In spot, the asset can drop in value and still remain in the wallet unless you sell it. In a leveraged perpetual, the position can run out of room much sooner because only margin stands behind it. That is why leveraged perpetual positions can reach liquidation long before the underlying asset goes to zero.
Margin, liquidation, and why small moves matter
Maintenance margin is the minimum equity a position must keep to remain open.
In this demo, the maintenance margin rate is 0.5% of the position value at the mark price. Position equity is margin plus unrealized PnL. Liquidation happens when position equity falls to the maintenance margin level. The loss is capped at the position’s margin.
For a spot trader, this is where leveraged futures feel very different. A spot position can move against you without being forced closed. A leveraged perpetual has a threshold where the remaining equity is no longer enough to support the position.
Leverage moves that threshold closer. The higher the leverage, the less room there is for an adverse move before equity shrinks toward maintenance margin. That is why small price changes can matter much more than they do in spot trading.
The liquidation formulas show that directly:
- For a long position, liquidation price = entry price x (1 - 1/leverage) / (1 - 0.005).
- For a short position, liquidation price = entry price x (1 + 1/leverage) / (1 + 0.005).
You do not need to memorize the math to understand the point. A long position is liquidated below entry, and a short position is liquidated above entry. As leverage rises, the gap between entry price and liquidation price gets smaller.
That is the practical reason small moves matter. With 100x leverage, only a very small adverse move is needed for equity to approach the minimum required level. With lower leverage, the position has more room to absorb price movement before liquidation becomes a risk.
For a first-time derivatives trader, margin is not just what opens the trade. It also defines how much loss the position can absorb before the market closes it.
How orders, pricing, and the demo environment work
Pricing in a perpetual depends on the mark price, which is the reference price used to value an open position. In this demo, mark prices follow public spot market data. If that feed is unavailable, the system uses a simulated walk so the market can keep running.
Execution uses a limit order book, which is the set of resting buy and sell orders at different prices. Matching follows price-time priority:
- Better prices match before worse prices.
- At the same price, earlier orders match before later ones.
- Each market shows ten price levels on each side.
A synthetic market maker is a simulated participant that continuously places quotes. Here, it provides those ten price levels on both sides of each market so traders can interact with a live demo book.
What the terminal shows is built around the derivatives workflow rather than spot ownership. The order form lets a trader choose long or short and set leverage from 1x to 100x. After execution, the position display tracks the entry price, mark price, unrealized PnL, margin ratio, and liquidation price.
For hands-on practice, ZK Futures uses play money only. Every balance is play money, and a new account starts with 1,205.50 test USDT.
Questions traders often ask first
Do I need to own BTC, ETH, SOL, DOGE, or PEPE to trade a perpetual?
No. A perpetual is a contract quoted in USDT, so you are trading the price move of the market rather than holding the coin itself. That is why a trader can open either a long or a short position without first buying the underlying asset.
If there is no expiry, what keeps a perpetual near the spot market?
The key mechanism is funding. Funding is a recurring payment between longs and shorts. When the rate is positive, longs pay shorts. When the rate is negative, shorts pay longs. In the demo, funding is settled every 30 seconds, and each settlement is capped at 0.1% of the position value.
How do I read position value versus margin?
Position value is the full size of the contract exposure. Margin is the play-money amount set aside to support that exposure. With isolated margin, that support is ring-fenced to one position, so the trade stands on its own instead of drawing on margin shared with others.
Why can funding matter even when the rate looks tiny?
Because it repeats. A small payment can add up across many settlements if a position stays open. For example:
- A funding rate of 0.01% on a position worth 10,000 USDT is 1 USDT per settlement.
That does not decide direction, but it does affect the running cost of holding the position.
Where can I practice this without real funds?
ZK Futures is a testnet demo of a hybrid crypto exchange for perpetual futures. Every balance is play money, and a new account starts with 1,205.50 test USDT.
Start with the structure, not the size
A first step into derivatives is easier when you separate three questions:
- Do you want to own the coin, or only track its price?
- Does the contract end on a set date, or can it stay open?
- What can force the position closed before you choose to exit?
Those questions help you compare spot, quarterly futures, and perpetuals without getting distracted by bigger notional exposure.
For new derivatives traders, the discipline is simple: learn the rules before increasing leverage, keep losses bearable, and assume fast moves can matter. Practice helps when it is consequence-free.
On ZK Futures, every balance is play money, a new account starts with 1,205.50 test USDT, and the demo covers BTC, ETH, SOL, DOGE, and PEPE perpetuals quoted in USDT.