Fixed rate: how it protects you from market swings
Why the amount you receive doesn’t change while you pay, and what happens if you run out of time.
Crypto prices change every second. While you open your wallet, copy the address and confirm the transfer, Bitcoin can rise or fall by a percent. And while the transaction waits for network confirmations, the price can move even further. If a swap service calculates your payout at the rate when the money arrives, you don’t know until the very end how much you’ll get.
A fixed rate solves this problem: the payout amount is set when the order is created and doesn’t change after that. In this article we explain how a swap service’s rate is formed, how a fixed rate differs from a floating one, work through an example of the difference and cover what matters for the lock to work.
How a swap service’s rate is formed
The rate you see at a swap service is made up of several components:
- Market price. The service follows prices on the largest exchanges. For a pair such as BTC → USDT, that’s the current dollar price of Bitcoin.
- Markup. The difference between the market price and the customer rate is the service’s income, covering its costs and risks.
- Network fee for the payout. The service sends you the coins and pays the network for it. This fee is often already built into the rate.
- Reserve. The service can only pay out what it actually holds in the coin you want. The reserve shows the maximum available for a swap.
The market price changes all the time, so the service’s rate changes too. The question is which moment it’s calculated at for your order.
Floating vs fixed rate: what’s the difference
Swap services use one of two models.
| Parameter | Floating rate | Fixed rate |
|---|---|---|
| When the payout is determined | When the funds arrive or are confirmed | When the order is created |
| Who bears the price risk | The customer | The swap service |
| Do you know the result in advance | No, only roughly | Yes, exactly |
| Is there a time limit | Usually not | Yes, you must pay within the window |
| When it’s more convenient | Calm market, fast networks | Volatile market, slow networks, large amounts |
With a floating rate you get exactly the market result at processing time — and if the market fell in the meantime, you get less than you expected. With a fixed rate the service takes on that risk, and you know the exact amount in advance.
How rate locking works
The mechanics are simple, but there are important details.
- You create an order. You choose the pair, enter the amount and the recipient address. The service calculates the payout at the current rate.
- The rate is locked. From this moment the payout is stated in the order and doesn’t change. A timer starts — usually for 30 minutes.
- You send the payment. To the address in the order, exactly the stated amount, on the stated network.
- The operator checks the deposit. They verify the amount, network and number of confirmations.
- Payout at the locked rate. Even if the market moved sharply during confirmations, you receive the amount in the order.
Example: what not locking the rate can cost
Say you’re swapping 0.1 BTC for USDT. When you create the order, the customer rate is 80,000 USDT per BTC, so the payout is 8,000 USDT. You send the BTC, and while the transaction waits for confirmations, the market drops 3%.
| Scenario | Rate used | You receive |
|---|---|---|
| Fixed rate | 80,000 USDT (from the order) | 8,000 USDT |
| Floating rate, market down 3% | 77,600 USDT | 7,760 USDT |
| Floating rate, market up 3% | 82,400 USDT | 8,240 USDT |
As you can see, a floating rate works both ways: you can get more or less. A fixed rate removes the uncertainty. For most people, knowing the result in advance matters more than trying to guess where the market will go in the next half hour.
What matters for the lock to work
A fixed rate is an agreement: the service locks the payout, and you send payment on the agreed terms. Here’s what to observe.
- Pay in time. The timer on the order page shows how much time is left. Send the transfer right after creating the order.
- Send the exact amount. The rate is locked for the amount in the order. Remember that the sender pays the network fee, and an exchange may deduct a withdrawal fee.
- Use the right network. The network is shown in the order next to the address. A transfer on another network won’t be credited automatically.
- Send early on slow networks. A Bitcoin transfer can take longer than usual — choose a sufficient fee.
What happens in unusual situations
| Situation | What happens |
|---|---|
| You sent less than the order | The operator contacts you: the swap is recalculated for the actual amount at the current rate, or you top up the difference |
| You sent more than the order | The order amount is swapped at the fixed rate; the excess is recalculated at the current rate or refunded |
| You paid after the timer ran out | The order closes; the operator offers a swap at the current rate or a refund minus the network fee |
| You sent on time, but confirmations came later | Contact support with the hash: the operator will take the sending time into account |
If you didn’t pay in time
Nothing bad happens. If the timer expired and you haven’t sent payment yet, simply create a new order at the current rate. If the money arrived after the timer ended, the order will be closed, but the funds aren’t lost: the operator will contact you and offer an option — complete the swap at the current rate or return the funds minus the network fee.
If you sent the transfer on time but it was delayed on the network — for example, Bitcoin waited a long time for confirmations due to congestion — contact support and include the transaction hash. It shows the exact sending time, and the operator will help complete the swap on the order’s terms.
When a fixed rate is especially useful
- On volatile days. When the market moves several percent in an hour, locking protects you from unpleasant surprises.
- When swapping Bitcoin. BTC confirmations can take anywhere from 10 minutes to an hour — enough time for the price to change.
- With large amounts. Even a 1% swing on a large sum is real money.
- When you need an exact result. For example, if you’re swapping crypto to pay an invoice for a specific amount in USDT.
How it works at ROVEN exchange
At ROVEN exchange every direction uses a fixed rate. Before you even create an order, you see the rate, the minimum amount, the reserve and the exact payout. Once the order is created, the rate is locked for 30 minutes, the timer is shown on the order page, and the status updates as the order is processed — on the site and in Telegram.
Every order is checked by an operator, so unusual cases — partial payment, late payment, network delays — are handled manually rather than with an automatic rejection.
How to compare rates across swap services
Monitoring sites show rates in a single format, but the rate figure isn’t the only thing worth comparing. Focus on what you’ll actually receive.
- Payout amount. Work out how much will reach your address after all fees. A slightly better rate can turn out worse if the service deducts a separate payout fee.
- Whether the rate is fixed. A floating rate on a monitoring site may differ from the one your order is actually calculated at.
- Reserve and limits. If the reserve is smaller than the amount you need, the service simply can’t complete the swap.
- Rate validity. The shorter the timer, the less margin you have for slow networks like Bitcoin.
How to make sure the rate is really locked
With an honest swap service, the lock is visible straight away. After you create an order, its page shows the rate, the amount to pay, the payout amount and a timer until the rate expires. These figures don’t change when you refresh the page, even if the market has moved in the meantime.
Save the order link or take a screenshot of its page: if a dispute arises, you’ll have the terms on which you sent the funds. In ROVEN exchange’s Telegram notifications, the payout amount is repeated in every status message.
Frequently asked questions
Can the rate change after I create the order?
No, as long as the timer is running and you send the exact amount on the right network. The payout is stated in the order and doesn’t depend on market movements.
Is a fixed rate worse than the market rate?
A swap service’s rate always includes a markup — that applies to floating rates too. Locking only shifts the price risk from you to the service, and its duration is limited, so the difference is usually small.
What if the market rises in the meantime?
You receive the amount in the order. A fixed rate works both ways: it protects you from a drop but doesn’t add profit on a rise. In return, you know the result in advance.
Why is the rate locked for exactly 30 minutes?
That’s enough time to pay comfortably from any wallet or exchange. A longer lock would increase the service’s risk and, as a result, the markup for every customer.
