Why Isn't There a "Buy" Button?
If you have used a spot exchange like Coinbase or Binance to buy crypto, you are used to seeing a Buy button and a Sell button. Simple.
Then you visit a perpetual futures exchange and the buttons say Long and Short. No "Buy" anywhere. What is going on?
This is not a design quirk — it reflects a fundamental difference in what you are doing.
Spot Exchanges: You Buy and Sell Assets
On a spot exchange, you are trading actual assets:
- Buy = you spend USD (or USDC) and receive ETH in your wallet
- Sell = you give up ETH and receive USD back
You own the asset. It sits in your account. "Buy" and "Sell" make perfect sense because you are literally acquiring or disposing of something.
Perp Exchanges: You Open and Close Positions
On a perpetual futures exchange, you never own the underlying asset. Instead, you open a contract — an agreement that pays out based on price movement.
- Long = open a contract that profits when the price goes up
- Short = open a contract that profits when the price goes down
There is no asset changing hands. You are not "buying" Bitcoin — you are opening a position that tracks Bitcoin's price. That is why the button says "Long" instead of "Buy."
To understand the difference between long and short in detail, see our guide to long vs. short positions.
What About Closing a Position?
This is where it gets slightly confusing for newcomers:
- Closing a long position is done by selling (or "shorting") the same amount. The two cancel out and your position goes to zero.
- Closing a short position is done by buying (or "longing") the same amount.
So on some interfaces, you might see a "Close" button, or you might see the long/short buttons with a "Reduce Only" toggle. Either way, closing is just opening the opposite direction.
Why Not Just Say Buy and Sell?
Because "Buy" is ambiguous in a perps context:
- Are you opening a new long position?
- Are you closing an existing short position?
Both involve "buying" the contract, but they have opposite effects on your exposure. Using "Long" and "Short" removes the ambiguity entirely.
A Side-by-Side Comparison
| Action | Spot Exchange | Perp Exchange |
|---|---|---|
| I think the price will go up | Click Buy | Click Long |
| I think the price will go down | Click Sell (if you hold the asset) | Click Short |
| I want to exit my position | Click Sell | Click Close (or open the opposite direction) |
| What do I own afterward? | The actual asset | Nothing — just a contract tracking the price |
The Mental Model Shift
The key insight is this: on a spot exchange, you are managing an inventory of assets. On a perp exchange, you are managing exposure to price movement.
- Spot: "I have 2 ETH. I want to sell 1."
- Perps: "I have a 10x long on ETH. I want to reduce it by half."
Once this clicks, the interface makes sense. Long and Short are the natural verbs for opening directional exposure, just like Buy and Sell are the natural verbs for managing assets you own.
Tips for Newcomers
- Think in terms of direction, not ownership. You are not buying ETH — you are going long ETH.
- Long = bullish, Short = bearish. That is the entire mental model.
- Closing is just the reverse. Close a long by shorting the same size. Close a short by longing the same size.
- Start with the ELI5. If the concept still feels slippery, our plain-English perps guide walks through the whole thing with analogies.
Keep Learning
- What Are Perpetual Futures? — the full beginner guide to how perps work
- What Does Long vs. Short Mean? — deep dive into the two directions
- Explain Perps Like I'm 5 — perps explained with zero jargon
Ready to try it yourself? Open Ventuals →