Fees

The convert button: the cost that appears on no fee schedule

Most platforms offer two ways to exchange one asset for another. One shows you a market and charges a stated fee. The other shows you a price and charges nothing visible. The second is almost always the more expensive of the two, and the reason it does not look that way is that its cost is inside the number rather than beside it.

· 9 min read

Two ways to buy the same thing

The first route is the order book. You see resting bids and offers, you place an order, it executes against somebody else's, and a stated fee is applied to the value traded. Everything about that transaction is itemised and comparable.

The second is a quoted price. You are shown a single number, you accept or refuse it, and the exchange happens against the platform rather than against another user. There is usually no fee line at all, and many interfaces say so explicitly.

The absence of a fee line is not the absence of a cost. In the second route the platform quotes you a price that is worse than the one available in the book, and the difference is its compensation. The transaction is not free, it is unitemised, and those are very different things.

The absence of a fee line is not the absence of a cost. It is the difference between a cost that is itemised and one that is folded into a number.

Where the cost hides inside a quote

At any moment the order book has a best bid and a best offer, and the midpoint between them is the closest thing to a neutral price. A quote to buy sits above that midpoint and a quote to sell sits below it, and the distance is what you are paying.

That distance has two components worth separating. Part of it is the genuine spread you would also cross in the book, which is a real cost of immediacy that exists either way. The rest is the additional margin the platform adds, and that part is the difference between the two routes.

Neither component is displayed. What you see is a single number that combines them with the mid price, which is why the cost feels like it is not there. It is entirely there, it is simply not broken out, and no interface is obliged to break it out.

Why a quote is a different product

It is worth being fair about what the platform is doing, because it is not nothing. A quote is a firm price held for a few seconds, which means the platform takes the risk that the market moves between your seeing it and your accepting it. That risk has a price and somebody has to bear it.

The platform also absorbs the execution problem. In the book, a large order may fill at several levels and end up worse than the top of book; with a quote, the number you accepted is the number you get, and any difference is the platform's problem rather than yours.

So the additional margin buys certainty and simplicity. Whether that is worth what it costs depends on how much you are exchanging and how often, and the honest framing is that it is a product with a price rather than a trick. The problem is not that it costs something, it is that almost nobody knows how much.

Measuring it yourself in thirty seconds

Open the quote for the amount you intend to exchange and write down the effective rate. Then open the order book for the same pair and read the best bid and best offer. The midpoint of those two is your reference, and the gap between your quoted rate and that midpoint is what the route costs you.

Express it as a percentage of the amount and compare it against the published trading fee for the same transaction. That comparison is the entire analysis, it uses only numbers both routes display, and it takes less time than reading a help page about either.

Do it once for a small amount and once for a large one, because the two routes scale differently. A quote often widens with size while a book fee is proportional, so the answer for a small exchange is frequently not the answer for a large one.

What the published schedule looks like beside it

The value of a stated fee is that it can be compared, budgeted and audited afterwards. You can compute what a year of activity costs before doing it, and you can check the total against your statements. None of that is possible with a cost folded into a rate you did not record.

The schedule below is the itemised side of that comparison, and it applies to the order book route. It is here so the arithmetic in this article has something concrete to sit against rather than as a claim about anybody else.

The point is not which number is larger in any given case. It is that one of them can be checked and the other cannot, and a cost you cannot check is a cost you cannot manage.

MarketMaker TakerWhat it means
Buying and selling assets outright0.100 %0.100 %0.0100 %
Leveraged positions on contracts0.020 %0.060 %0.0060 %

When the convert button is the right choice

Three situations make it correct rather than merely convenient. Very small amounts, where the absolute cost is trivial and the time saved is worth more. Pairs with no direct market, where the alternative is two transactions through an intermediate asset and two crossings instead of one.

The third is when the price certainty genuinely matters, which is rarer than people think but real. If you are exchanging to meet an obligation of an exact size, a firm quote removes an execution risk that the book would leave with you, and paying to remove it is a reasonable trade.

Outside those, the route is a convenience purchase. There is nothing wrong with buying convenience, and the only failure mode is buying it without knowing the price, repeatedly, for years.

The compounding, and why it goes unnoticed

The reason this cost escapes attention is its shape. It is small on any single transaction, invisible in any statement, and never summed anywhere. A trader who would refuse a stated fee at the same level accepts it dozens of times without a decision ever being made.

The arithmetic over a year is straightforward and unpleasant. The cost is proportional to the value exchanged and independent of whether the position worked, so it applies to every rebalance, every entry, every exit, and every conversion between holdings, regardless of outcome.

None of this depends on any prediction about markets. It is the one part of the result that is knowable in advance, which is precisely why it deserves more attention than it gets and usually receives less.

Recurring purchases and the same trap

Automatic recurring purchases are a good habit that frequently uses the expensive route by default. The convenience that makes the habit sustainable is the same convenience that carries the wider quote, and the frequency multiplies it.

Many platforms allow the same schedule to execute against the book instead, sometimes under a different name, and the setting is usually a menu rather than a different product. Finding it once changes every future execution of the schedule.

If the option does not exist, the alternative is fewer and larger purchases through the book, which trades a small amount of averaging for a lower rate. Which is better depends on the numbers, and the numbers are available before choosing.

What the order book asks in exchange

The cheaper route is not free of demands. It asks you to understand a bid and an offer, to choose an order type, to accept that a resting order may not fill, and to tolerate seeing your order sitting there while the price moves. Those are real costs in attention and comfort.

For somebody exchanging occasionally and in small amounts, that learning is genuinely not worth it, and saying otherwise would be dishonest. The threshold where it becomes worth it is a personal calculation and it arrives sooner than most people assume.

What tips it is usually frequency rather than size. Somebody exchanging monthly for years will spend more on quotes than the hour it would take to learn the other route, and that comparison is the one that actually settles it.

What tips the balance is usually frequency, not size. A monthly habit costs more in quotes than the hour it takes to learn the other route.

Reading a platform honestly on this

Three questions describe any platform's position. Does a book exist for the pair you want, or only a quote. Is the quote's margin disclosed anywhere, in any form. And does the interface make the cheaper route reachable, or does it require leaving the main flow to find it.

The third is the most informative and the least discussed. A platform where the book is one tap away is making a different choice from one where it is behind an advanced mode, and neither is hidden: it is visible in the interface within a minute of looking.

None of this requires assuming bad intent. Quoted routes exist because most users prefer them, and the interfaces reflect that preference honestly. What it requires is knowing which route you are on, which is a question worth asking once and then never again.

Frequently asked

Is the convert button really free?

No. There is usually no fee line, but the quoted price is worse than the one available in the order book and that difference is the platform's compensation. The cost is folded into the number rather than shown beside it, which is not the same as not existing.

How do I measure what a quote costs me?

Note the effective rate the quote gives you, then read the best bid and best offer in the order book for the same pair. The midpoint between them is your reference, and the gap between your quoted rate and that midpoint is what the route costs. Express it as a percentage and compare with the published trading fee.

Why does a quote cost more than the book?

Because the platform holds a firm price for a few seconds and takes the risk that the market moves in between, and because it absorbs the execution problem: the number you accepted is the number you get, even if filling it in the book would have been worse. That certainty is a product with a price.

Does the cost scale the same way in both routes?

Not usually. A stated trading fee is proportional to value, while a quote often widens with size. That means the cheaper route for a small exchange is frequently not the cheaper route for a large one, which is why it is worth measuring at both sizes.

When is the convert button the correct choice?

Very small amounts where the absolute cost is trivial, pairs with no direct market where the alternative is two crossings through an intermediate asset, and cases where a firm price genuinely matters because you are exchanging to meet an obligation of an exact size.

Why does this cost go unnoticed?

Because of its shape. It is small on any single transaction, absent from any statement, and never summed anywhere. Somebody who would refuse a stated fee at the same level accepts it dozens of times without a decision ever being made explicitly.

Do recurring purchases use the expensive route?

Frequently, by default. The convenience that makes the habit sustainable carries the wider quote, and the frequency multiplies it. Many platforms let the same schedule execute against the book instead, usually as a setting rather than a different product, and finding it once changes every future execution.

What does the order book ask in return for being cheaper?

Understanding a bid and an offer, choosing an order type, accepting that a resting order may not fill, and tolerating watching it sit while the price moves. Those are real costs in attention. What usually tips the balance is frequency: a monthly habit costs more in quotes than the hour it takes to learn.

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