How to short a crypto coin with futures: step by step

To short a crypto coin with futures, you open a 'short' position on that coin's futures market: it gains value when the price falls and loses value when the price rises. You put up USDC as margin, choose the size and leverage, and close the position later to take the profit or loss. You never need to own or borrow the coin itself.

Shorting is how traders profit from a falling market or protect coins they already hold against a drop. It is also where many traders lose money fastest, because a short has no natural ceiling on how far the price can go against it, and leverage brings the point of liquidation much closer. This guide covers the mechanics, a worked example and the specific mistakes worth avoiding. On sasa, futures are at /futures/.

What does it mean to short a crypto coin?

In traditional markets, shorting means borrowing a share, selling it, and buying it back later, hopefully cheaper. Crypto futures skip the borrowing. A futures contract simply tracks the coin's price, and you choose a side. A long gains when the price rises. A short gains when the price falls. Your result is the size of the position times the percentage change, plus or minus funding and trading costs.

Most crypto futures today are perpetual futures, often called perps. Unlike a dated contract, a perp has no expiry. It stays open until you close it or until your margin runs out. To keep the perp's price close to the actual coin price, longs and shorts pay each other a small periodic amount called funding, which is covered below.

Margin, leverage and position size

Three numbers define every futures position, and mixing them up is the most common beginner error:

• Margin: the USDC you put up. This is the money at risk.
• Leverage: how many times your margin the position is worth. On sasa it goes up to 20x.
• Position size: margin times leverage. This is the amount your profit and loss is calculated on.

With $100 of margin at 5x, your position size is $500. A 1% move in the price changes the position by $5, which is 5% of your margin. Leverage does not change how much the coin moves; it changes how hard each move hits your margin.

How to short a coin with futures, step by step

1. Fund your balance with USDC. On sasa, futures use the same USDC balance as everything else, so there is no separate futures wallet to top up.
2. Open the futures page and pick the market, for example Bitcoin, Ethereum or Solana.
3. Choose short.
4. Enter your margin and choose leverage. Start low; the worked example below shows why.
5. Check the liquidation price shown before you confirm. If that price is close enough to be hit by a normal day's move, lower the leverage.
6. Decide your exit before you open: the price where you take profit and the price where you admit you were wrong and close.
7. Confirm, then watch the position. When you close it, the margin plus or minus the result returns to your balance.

Worked example: shorting Solana at 5x

Example (illustrative numbers, ignoring trading fees and funding): Solana trades at $200. You expect a drop and open a short with $100 of margin at 5x leverage, so your position size is $500, the equivalent of 2.5 SOL.

• Price falls 10% to $180: each SOL is $20 lower, and 2.5 times $20 is $50 of profit. That is a 50% return on your $100 margin.
• Price rises 10% to $220: the same arithmetic in reverse, a $50 loss, half your margin gone.
• Price rises about 20% to $240: the loss reaches about $100, the whole margin. In practice the position is liquidated a little before that, because exchanges require a small maintenance margin to stay open.

Now run the same trade at 20x. Your $100 of margin controls a $2,000 position. A 5% rise, from $200 to $210, costs about $100 and liquidates you. Solana moving 5% in a day is ordinary. At 20x you are betting not just on direction but on the price never moving much against you first, which is a far harder bet.

How funding rates affect a short

Funding is a small payment exchanged between longs and shorts at regular intervals. When the funding rate is positive, longs pay shorts; when it is negative, shorts pay longs. A positive rate usually means more traders are long and the perp trades a little above the spot price.

For a short, positive funding is a small tailwind and negative funding is a slow cost. Over a few hours it rarely matters. Over days or weeks, it can add up to a meaningful share of your margin. The Data tab shows current funding rates, and funding rates explained covers how to read them, including why very high funding sometimes comes before a sharp drop as crowded longs unwind.

When does shorting make sense?

• Hedging: you hold a coin you do not want to sell, and a short of similar size offsets some of the loss if it falls.
• A clear, time-limited view: a level you expect to break, an event you expect to disappoint, with a defined point where you are wrong.
• Crowded positioning: very high funding and rising open interest can mean many late longs, which can fall quickly if price turns.

Shorting makes the least sense against strong momentum. Coins at the top of a daily top gainers list can keep rising far longer than seems reasonable, and a short against that kind of move is the classic way to get liquidated. Meme coins are also usually not available as futures at all, so a falling meme coin is something you avoid or sell, not short.

Mistakes that liquidate short sellers

1. Using maximum leverage because it is available. Most liquidations are a normal move plus too much leverage.
2. Opening a short right after a big red candle. By then the easy part of the drop is often gone, and sharp bounces after big drops are common.
3. Adding margin to a losing short to avoid liquidation. It moves the liquidation price but also enlarges the loss if you are still wrong.
4. Shorting into a squeeze: when many traders are short and price ticks up, their forced buying pushes it further.
5. Ignoring funding on a long-held short when the rate is negative.
6. Having no exit plan. A short you meant to hold for an hour should not become a position you hold for a week because you are waiting to be proven right.

The same exit discipline used in spot trading applies here; take profit and stop loss for meme coins explains how to set both before you enter, and the logic carries over directly to futures.

Shorting vs buying a 'no' in a prediction market

If your view is simply 'this coin will be below this price on Friday', a prediction market can express it with a fixed maximum loss and no liquidation. A short pays more for a bigger drop but can be closed out by a spike before Friday arrives. Crypto prediction markets explained compares the two in more detail. Many traders use futures for moves they expect soon and predictions for outcomes at a fixed date.

Shorting on sasa: what to know

On sasa, you can long or short Bitcoin, Ethereum, Solana and more with up to 20x leverage, using the same USDC balance you use for meme coins. Open /futures/, choose the market and the short side, set margin and leverage, and check the liquidation price before confirming. Futures are not available in some countries, including the US and Turkey. Leveraged trading can lose your full margin quickly; size every position as money you can afford to lose.