Honestly, when I first started understanding perpetual contracts, it seemed like black magic. But in reality, it’s just a tool that operates according to clear rules — you just need to learn them before risking real money.

Perpetual Contract (Perpetual Futures, or PERP) — is essentially an agreement to buy or sell cryptocurrency at an agreed-upon price, but without a fixed settlement date. The difference from spot trading is simple: when you trade spot, you hold the actual asset. With perpetual contracts, you’re only trading a contract representing that asset, and settlement occurs later or not at all until you close your position.

Why do people do this at all? Main reasons: hedging (risk protection), the ability to short (profit from falling prices), and of course, leverage. Here’s where it gets interesting. Imagine you have $100, but you can control a $1,000 position using 10x leverage. If the price increases by 10%, your profit is $100. Sounds great? The problem is, if the price drops by 10%, you lose all your $100.

This is where margin comes into play. Initial margin is the collateral you put up when opening a position. Maintenance margin is the minimum balance that must remain in your account to prevent forced liquidation. If your margin falls below this level, the system automatically liquidates your position. And it’s not just closing — you also pay a liquidation fee.

When I talk about liquidation, I’m not joking. It’s the main risk of perpetual contracts. Even if the price just “spiked” downward (plummeted sharply and then recovered), that might be enough to trigger the liquidation price, and you’ll lose your entire margin. That’s why a stop-loss is your best friend.

Another important point is the funding rate. It’s a floating fee paid between longs and shorts to keep the contract price from deviating too far from the spot price. If most traders are long, the rate is positive, and longs pay shorts. This mechanism helps balance the market. The rate is recalculated every 8 hours.

Now about the positions themselves. Long means you’re betting on the price going up. Short means you’re betting on the price going down. If you go long Bitcoin at $100 and the price rises to $120, you make $20 profit. If you short at $100 and the price drops to $80, you also profit $20.

When opening a position, you can choose between a market order (executes immediately at the current price) and a limit order (waits until the price reaches your level). Market orders are faster but can be more expensive. Limit orders are cheaper but may not fill at all.

There’s also a difference between contracts based on U (settlements in USDT) and contracts based on tokens (settlements in the actual cryptocurrency). If you trade U-based contracts, you see your profit immediately in dollars. With token-based contracts, it’s more complicated — you can earn 20% in Bitcoin, but if Bitcoin drops, your actual profit can vanish.

The insurance fund is a mechanism that protects profitable traders from the bankruptcy of losing traders. When the system can’t close a position in time and the balance goes negative, the insurance fund covers the losses. In extreme cases, automatic leverage reduction can occur, where profitable positions are forcibly required to contribute part of their profits to cover losses.

Marked price is the fair value of the contract, different from the last traded price. It helps prevent incorrect liquidations during sharp price jumps. PnL (profit and loss) can be realized (when you close the position) and unrealized (while the position remains open).

The most important advice: don’t trade perpetual contracts if you don’t fully understand the mechanics. It’s not a casino; it’s a tool with clear rules, but you need to know those rules. Set a stop-loss, don’t use maximum leverage, and remember that price spikes can happen at any moment. Start small and learn through practice.