Order Matching Simulator — See How Your Order Would Fill
Marketplace trades are matched by an order book, not by players dealing with each other directly. Set a buy or sell order against a sample book and watch whether it fills, at what price, and why.
Order Matching Simulator
Set a maximum buy price and some sample asks to see which one your order would actually fill against.
Result
The order book
Formula
fill = lowest ask ≤ your maximum saving = your maximum − fill
Example: a maximum of 8,500 against asks of 8,200 / 8,600 / 9,000 fills at 8,200 — 300 below your ceiling, because you pay the lowest eligible ask, not your maximum.
An educational model of matching, not a live order book. Real depth, timing and queue position are not visible to this tool.

//- 01 - HOW IT WORKS
HOW IT WORKS
- Choose whether you are buying or selling, and set your price. For a buy order, that price is your maximum — you will never pay more than it.
- The simulator compares your order with the resting orders in its example book.
- See the outcome: filled at the best resting price, or left waiting because no order crossed yours.

//- 02 - HOW TO READ YOUR RESULT
HOW TO READ YOUR RESULT
- A buy order fills at the lowest available sale price, not at your maximum. Example: bid up to 8,500 against a lowest ask of 8,400 (illustrative) and you pay 8,400.
- If your maximum sits below the lowest ask, nothing fills. Your order rests in the book until a matching order appears, or until you cancel or change it.
- Sell orders work in mirror image: your listing waits in the book until a buy order reaches your price.
- When two orders could match at the same price, the one placed first is matched first.
//- 03 - A WORKED EXAMPLE
A WORKED EXAMPLE
Example — the book and the prices in it are illustrative. Imagine the sample book for one item holds three resting sell orders: 8,400, 8,600 and 9,000 Credits. Place a buy order with a maximum of 8,500 and watch what the simulator does: it fills you at 8,400, the lowest resting ask — not at your 8,500 maximum. Your ceiling protected you; it did not set your price. Now lower your maximum to 8,300 and run it again. Nothing fills. Your order joins the book as a resting bid, waiting for a seller willing to accept 8,300 or less, and it stays there until one appears or you cancel or modify it. Flip sides for a third run: place a sell order at 8,450. That does not fill either, because the highest bid in the book sits below your price, so your listing rests — and if another seller lists at 8,450 after you, yours is still matched first when a buyer arrives, because orders at the same price fill in the order they were placed. Three runs, three core rules: you fill at the resting price, unfilled orders wait, and ties go to whoever was there first.

//- 04 - WHAT THE SIMULATOR TEACHES YOU
WHAT THE SIMULATOR TEACHES YOU
The simulator exists because the order book’s rules are simple to state and surprisingly easy to misjudge in the moment. Practising against a sample book, with no Credits at stake, builds the instincts that protect real ones. You learn that patience and price are a trade-off you make consciously: cross the book and fill now at the resting price, or rest your order and wait for the market to come to you — possibly for a long time, possibly forever. You learn that a generous buy maximum is not reckless, since you still pay the lowest ask, but that it removes your reason to wait, so it should be a decision rather than a reflex. And you learn the discipline sellers need: a listing priced above every bid is not really “on the market” in any practical sense, whatever the screen says. When the real Marketplace is in front of you, these judgements have to happen quickly. The simulator is where you make them slowly, on examples, until the mechanics feel obvious — which is exactly when they stop costing you money.

//- 05 - COMMON MISTAKES
COMMON MISTAKES
- Expecting to pay your maximum. A buy order fills at the lowest resting ask. Set a maximum of 8,500 against an ask of 8,400 and you pay 8,400. The simulator shows this on the first run, and it surprises almost everyone.
- Treating a resting order as a failed order. An unfilled order is a position, not an error. It fills when a crossing order arrives, and on the real Marketplace it can be cancelled or modified from the My Transactions tab before it completes.
- Trying to choose your trading partner. The book is anonymous. There is no way to aim an order at a specific player — or to be aimed at, which is also your protection.
- Pricing a listing by hope. A sell order far above the highest bid rarely teaches the market a lesson; it mostly teaches you patience. Use the simulator to see how far a price can sit from the book before nothing ever crosses it.

//- 06 - GOOD TO KNOW
GOOD TO KNOW
The simulator uses example orders to teach the matching rules — it is not connected to the real Marketplace and shows no live listings or real prices. That matters right now: Ubisoft currently lists the Marketplace as temporarily closed, with no reopening date announced, so this page is a safe place to learn the mechanics before real Credits are involved.

//- 07 - FREQUENTLY ASKED QUESTIONS
Straight answers
Using the Simulator
Why did my simulated order not fill?
No resting order crossed your price — as a buyer, your maximum was below the lowest ask; as a seller, your price was above the highest bid.
Is the simulator connected to the real Marketplace?
No. It runs against a built-in example order book so you can learn the matching rules with nothing at stake. It shows no live listings and cannot place, change or cancel a real order — anything you do here stays on this page.
Are the prices in the simulator real?
No. The orders and prices in the sample book are illustrative examples chosen to demonstrate the mechanics — a fill at the resting price, an order left waiting, a tie broken by time. There is no official public price feed for the Marketplace, so treat every figure here as a teaching example, not market data.
What should I try first if I have never used an order book?
Run three quick experiments. Set a generous buy maximum and watch yourself fill below it; set a maximum under the lowest ask and watch your order rest instead; then place a sell order above the highest bid and see your listing wait. Those three runs teach the core rules faster than any explanation.
Can I practise selling as well as buying?
Yes — the simulator works in both directions. Sell orders mirror buy orders: your listing joins the book at your price and fills only when a buy order reaches it. Practising the sell side is worthwhile, because most beginners only ever rehearse buying and then meet the book’s patience test for the first time as a seller, with real Credits involved.
How Matching Really Works
Do I get to choose who I buy from or sell to?
No. Orders are anonymous and matched by the system. There is no direct player-to-player trading on the Marketplace.
Can I change or cancel an order?
On the real Marketplace, Ubisoft’s FAQ says active orders can be cancelled or modified from the “My Transactions” tab before they complete. It is worth trying the simulator first to see why you might want to.
Why did I pay less than the maximum I set?
Because your maximum is a ceiling, not the price. A buy order is matched with the lowest available sale order, so if the lowest ask sits below your ceiling, you fill at that lower resting price. Your maximum only decides the worst you are willing to pay — the book decides what you actually pay.
Two orders at the same price — which one fills first?
The one placed first. When orders could match at the same price, the book works through them in the order they arrived, oldest first. It is a small rule with a practical consequence: at a popular price, an order placed early is ahead of every identical order placed later.
As a seller, do I pay anything when my order fills?
Yes. When a sale completes, the Marketplace’s 10% transaction fee is deducted from your proceeds — the buyer pays the agreed price, and you receive that price minus a tenth. It is worth running a filled sell price through the Fee Calculator so the payout never surprises you.
//- 08 - RELATED TOOLS
KEEP GOING
- Trading & Orders — how orders, matching and the order book work in full
- Fee Calculator — what the seller keeps once a matched order completes
- Profit / Loss Calculator — turn a filled order into a real result