Understand
Perpetual vs Expiring Futures
A perpetual futures contract has no expiration date. You can hold it indefinitely. It is the dominant instrument in crypto derivatives: over 90 percent of retail futures volume flows through perpetuals. The mechanism that keeps the perpetual price anchored to spot is the funding rate, which is covered below.
An expiring futures contract settles on a fixed date. Before that date it trades at a premium or discount to spot, known as the basis. In a bullish market, futures typically trade above spot. That condition is called contango. In a bearish market or during periods of high fear, futures can trade below spot. That condition is called backwardation. The basis converges to zero at expiry regardless of where spot goes. That convergence is predictable and is the basis of carry trades covered in Lesson 5.
Going long means you profit when price goes up. Going short means you profit when price goes down. Unlike shorting in spot markets, shorting futures requires no borrowing. You simply open a short position. This is one of the most powerful features of derivatives: the ability to profit in down markets with the same ease as profiting in up markets.
Margin Types
| Type | How It Works |
|---|
| USD-settled (linear) | Margin and P&L in USD. A price move of $1,000 produces a predictable dollar gain or loss. Simpler to manage. Most major retail exchanges use USD-settled contracts. |
| Coin-margined (inverse) | Margin and P&L in the underlying crypto. P&L is non-linear. A rising BTC price changes the USD value of your margin in real time. Useful for miners hedging BTC income without converting to USD. More complex. |
| Isolated margin | Risk is limited to the margin allocated to that specific position. If the position is liquidated you lose that margin only. Other positions and your remaining balance are unaffected. Best for most retail traders. |
| Cross margin | Your entire account balance is used as margin across all open positions. A losing position draws from the same pool as your other positions. More efficient on capital but a single bad trade can wipe your full account. |
Funding Rates
The funding rate is a periodic payment between longs and shorts. Calculated every eight hours on most exchanges, it is based on the difference between the perpetual price and the spot index. When the perpetual trades above spot, longs pay shorts. When it trades below spot, shorts pay longs.
What matters practically is the annualized cost. A rate of 0.01 percent per eight hours annualizes to approximately 11 percent. At 0.05 percent it is 54 percent annualized. At 0.1 percent it exceeds 100 percent. Any trader carrying a leveraged long position when funding is running at 0.1 percent per period is paying over 100 percent annualized to hold that position. That cost compounds every eight hours whether the trade is profitable or not.
Funding rates are also one of the best sentiment signals in crypto. Persistently high positive funding means the market is crowded with longs. Those longs are paying heavily to stay in their positions. History shows this is often a precursor to a sharp reversal. Not because funding causes the reversal, but because it signals the degree of over-leverage that makes a cascade possible.
Leverage and Liquidation
Leverage multiplies your position size relative to your margin. At 5x, $2,000 in margin controls a $10,000 position. A 10 percent adverse price move produces a $1,000 loss. That is 50 percent of your margin. At 10x, the same 10 percent move wipes the margin entirely.
Liquidation occurs automatically when your margin balance falls to the maintenance margin threshold. The liquidation price is calculable before you enter. It is approximately your entry price minus your margin per unit of position for a long, and entry price plus margin per unit for a short. Know it before you open the trade.
Key Metrics
| Metric | What It Tells You |
|---|
| Open interest | Total notional value of all outstanding positions. Rising OI with rising price signals new money entering a trend. Falling OI with falling price signals capitulation and position unwinding. |
| Funding rate | Sentiment indicator and real carry cost. High positive funding signals crowded longs and elevated reversal risk. Negative funding signals crowded shorts. |
| Volume | How much is being traded. Spikes in volume during price moves confirm the move. Volume without price change suggests indecision. |
| Liquidation levels | Clusters of liquidations visible on CoinGlass act as price magnets. Large clusters above or below the current price attract stop-hunting moves. |
Rule of thumb: leverage of 3 to 5x gives you a buffer to manage a position actively. Above 10x, a single volatile candle can trigger liquidation before you can react. Use isolated margin so one bad position cannot wipe your account.
Apply
Before Opening Any Futures Position
01Decide your direction, long or short, and write down why before looking at the order screen.
02Select isolated margin mode. This limits your maximum loss to the margin allocated to this trade.
03Choose your leverage. Start at 3x or lower. Calculate your liquidation price using the platform calculator before confirming.
04Check the current funding rate. Multiply by 3 for the daily rate, then by 365 for the annualized cost. If you are going long and annualized funding exceeds 50 percent, factor that carry cost into how long you plan to hold.
05Set your stop-loss at a technical level, not at your liquidation price. Your stop should trigger well before liquidation does.
06Go to CoinGlass before entering. Check open interest direction, the long/short ratio, and recent liquidation clusters near the current price.
Case Study
May 2021: The China Mining Ban Cascade
In May 2021, BTC fell from approximately $58,000 to below $30,000 in three weeks: a 47 percent decline that liquidated billions in leveraged positions. The stated catalyst was China announcing a crackdown on Bitcoin mining and trading. But the scale and speed of the decline was not explained by the news alone. It was explained by what was visible in the derivatives data before the news hit.
Entering May 2021, the futures market was carrying extreme leverage. Funding rates had been running above 0.05 percent per 8-hour period for weeks: over 50 percent annualized. Open interest was at all-time highs. The long-to-short liquidation ratio showed that longs were dominant and paying heavily to hold their positions. These three signals together described a market where any significant negative catalyst would trigger a self-reinforcing cascade. The China news was the catalyst. The leverage was the accelerant.
Between May 12 and May 19, over $10 billion in positions were liquidated across exchanges. Each liquidation wave pushed price lower, which triggered the next wave. The cascade ran until the structural imbalance, the extreme long crowding that funding rates had been signaling for weeks, was cleared.
The lesson is not that you should have known China would act. It is that the derivatives data told you, weeks in advance, that the market was in a condition where any negative catalyst would produce a cascade. The funding rate was the signal. The open interest was the fuel. The news was the spark.
Key Takeaway
Know Your Numbers Before Every Trade
Perpetual futures dominate because they are simple to hold and the funding rate keeps them connected to spot. Knowing your leverage, liquidation price, margin mode, and funding cost before entry is the baseline of professional risk awareness. Lesson 3 builds on this foundation by introducing options. The risk structure is fundamentally different: no liquidation, but time decay and implied volatility working for or against you every day the position is open.