Lesson 7 — Exchange Contract Specifications: What Every Trader Must Understand

Before trading futures or other exchange contracts, you should understand the contract specifications. These specifications tell you exactly what you are trading, how much you can trade, what asset is used for margin and settlement, and what rules apply to the contract.

1. Quantity

Quantity means how much of the asset or contract you are buying or selling.

For example, if you buy 0.01 BTC in a spot market, your quantity is 0.01 Bitcoin.

2. Lot Size vs Fractional Quantity

Some markets allow you to trade a fraction of a coin. For example, you may be able to buy 0.001 BTC instead of one complete Bitcoin.

Some derivative contracts work differently. They may use a defined contract or lot size. One contract may represent a fixed amount of the underlying asset.

So, never assume that one unit always means one coin. Check the exchange's contract specification.

3. Price Precision

Price precision tells you how many decimal places are allowed when entering the price.

For example, if an exchange allows a price precision of two decimal places, you may enter a price such as 100.25 but not 100.257.

4. Notional Value

Notional value is the total value represented by a trade or position before considering leverage or margin.

A simple example: if you buy 0.1 BTC at 100,000 USDT, the notional value is 10,000 USDT.

This is important because your margin may be much smaller than the total notional value when leverage is used.

5. Contract Specifications

Every futures or derivative contract has its own specifications. These rules can be different from one exchange to another and can also be different between different contracts on the same exchange.

Always check the current specification before placing a trade.

6. Contract Type

Contract type tells you what kind of derivative you are trading.

Examples include perpetual contracts and futures contracts with a defined expiry.

Options are another type of derivative and have their own specifications.

7. Contract Size

Contract size tells you how much underlying asset one contract represents.

This is especially important in futures and other derivatives. A contract may represent a specific quantity rather than one complete coin.

8. Settlement Asset

Settlement asset means the asset used to settle the profit or loss of a contract.

Depending on the contract, settlement may be in a cryptocurrency or in a stablecoin such as USDT.

9. Margin Asset

Margin asset is the asset that you provide as collateral for a leveraged position.

For example, a particular contract may use USDT as margin, while another type of contract may use a cryptocurrency.

10. Minimum Order Size

Exchanges normally define a minimum quantity or minimum value for an order.

If your order is smaller than the allowed minimum, the exchange will reject it.

11. Maximum Order Size

Exchanges may also define a maximum order size.

This limit can depend on the particular market, contract and exchange rules.

12. Leverage Limits

Leverage allows you to control a larger position using a smaller amount of margin.

For example, with 10 times leverage, a trader may control a position with a notional value much larger than the margin deposited.

But leverage does not reduce your actual market risk. It increases the speed at which both profits and losses can occur.

Exchanges normally set maximum leverage limits for different contracts.

13. Tick Size

Tick size is the smallest allowed price movement for an order in a particular market.

For example, if the tick size is 0.10, prices may need to move in increments of 0.10.

14. Quantity Step

Quantity step tells you the allowed increment in the order quantity.

For example, if the quantity step is 0.001, you may be able to trade 0.001, 0.002, 0.003 and so on, subject to the exchange's other limits.

15. Funding Interval

Perpetual futures contracts normally use funding payments at regular intervals.

The funding interval tells you how frequently the funding payment is calculated or exchanged.

The interval is not necessarily the same across every exchange or contract.

16. Funding Rate

The funding rate determines the payment between long and short positions in a perpetual contract.

A positive funding rate generally means long-position holders pay short-position holders.

A negative funding rate generally means short-position holders pay long-position holders.

The exact calculation and timing depend on the exchange and contract.

17. Mark Price

Mark price is a reference price used by an exchange for important functions such as calculating unrealized profit and loss and determining liquidation conditions.

It is not necessarily the same as the last traded price.

18. Index Price

Index price is a reference price calculated using prices from selected underlying markets or exchanges.

It is used by derivative platforms to help represent the broader market price of the underlying asset.

19. Liquidation Mechanism

When a leveraged position loses too much value, the exchange may automatically close the position. This is called liquidation.

The exact liquidation process depends on the exchange, contract, margin mode and other rules.

This is why traders should understand the liquidation mechanism before using leverage.

20. A Simple Example

Imagine you want to trade a BTC perpetual contract.

Before placing the trade, you should know:

• What is the contract type?
• What does one contract represent?
• What is the minimum quantity?
• What is the quantity step?
• What is the tick size?
• What is the minimum and maximum order size?
• What asset is used as margin?
• What asset is used for settlement?
• What is the maximum leverage?
• How often is funding charged?
• How is the funding rate calculated?
• How are mark price and index price calculated?
• How does liquidation work?

Key Takeaway

Contract specifications are not just technical information. They directly affect how your trade is executed, how much you can trade, how much margin you need, and when your position can be liquidated.

Before trading a new contract, always open the exchange's current contract specifications and check the rules. Do not assume that the specifications are the same for every cryptocurrency or every exchange.