The two lists you bring

WizMatch asks for two things, and the difference between them is the whole idea:

What you are after is a wishlist.
What you can trade from is a binder you pick, or your whole collection if you choose it deliberately.

A binder is the sensible answer. Your collection is not an offer: most of it is spoken for, in decks or simply not going anywhere, and putting all of it on the table is how you end up explaining that no, actually, you would rather keep that one. A binder is the subset you have already decided you would part with, which is exactly what a trade folder is on a shelf.

Your whole collection is offered as a choice because somebody who has just arrived has no binder yet, and because sometimes you genuinely do want to know what somebody wants out of everything you own.

Making a link to send

Pick your two lists and press Create compare link. That publishes those two as pages and gives you a link. Send it, or show the QR code and let somebody scan it across the table.

The link shows the binder and wishlist you picked, and it says which ones those are before you make it. Changing the picks changes the link, so you can keep one for casual trades and another for the good stuff.

Only the two lists you chose are published. Your collection is not, and a compare link cannot publish one even if you have it selected: that would put every card you own on a public page.

Reading the answer

Two columns, and one number underneath them:

What you want from them is your wishlist against their binder.
What they want from you is their wishlist against whatever you offered.
The difference is what the trade is worth to each side, and which way it leans.

Quantities are capped by what is actually available. If you want four of something and they have one, that is a trade for one, and the total says so rather than pricing three cards nobody can hand over.

Cards match by name, not by printing. Somebody with a different printing of the card you want still has the card you want.

When the list is long

Both sides are card lists, with a picture, the type line, the mana cost and the price. Once a side has more than a handful, a search box and a sort appear above it.

Search matches names and type lines, so “dragon” finds the dragons and “instant” finds the instants.
Sort by value, name, mana value or rarity.
Tap a card to open it properly. Next and previous walk the rest of that side of the trade.

Neither searching nor sorting changes the trade. They change what you are looking at.

Keeping cards for later

Most trades do not finish on the day. Tick the cards worth chasing and send them to a wishlist, new or existing.

That wishlist behaves like any other from the moment it exists, which means you can share it back to the person you were trading with. They open the link and see exactly what you were after, without either of you writing anything down.

Haggling

The small × on a row takes that card out of the trade, and the difference re-prices as you go. That is the whole negotiation: pull things off each side until the number at the bottom is one you are both happy with. Put everything back undoes it.

Tapping the card itself opens it rather than removing it. Two different things live on one row, and losing a card because you wanted a closer look at it would be the wrong way round.

Nothing here changes either collection. WizMatch works out what a trade would look like; the trade itself happens between two people with cards in their hands.

The cards you would not have thought to ask for

A wishlist is a list of things you already knew you wanted, and it is the smaller half of what a collector actually wants. The other half is the card that finishes a set you are three quarters of the way through and had stopped thinking about.

So WizMatch also shows what they can spare that you are missing, grouped by set, with the set you are closest to finishing first. It needs no wishlist at all, which is what makes it the useful half when you have only just started.

A set only counts as one you are collecting once you own ten cards from it, or a tenth of it. Owning three cards from a five thousand card set is not a collection in progress, and saying so would bury the finds that mean something.

Trading with somebody who does not use Wizbook

They do not need an account. They do not need Wizbook. Send them the link and they can:

Bring a CSV exported from ManaBox, Moxfield, Deckbox or Archidekt, and see the comparison straight away. Their cards live in a temporary session and are deleted about half an hour after they stop using it. Nothing is published, and nothing is kept.
Or just look at the binder you shared, and give nothing at all.

A file with a set column matches better than one with only names. Every app named above writes one; a bare list of card names still works, but every row lands on whichever printing comes first, which makes set-completion finds much weaker.

Sending a link of their own is the one part that needs an account, because the page has to live somewhere.

What the other person sees of you

Nothing you did not publish. Comparing reads what they shared; it does not send them your collection, your wishlists or your other binders. Your display name appears only if you ticked the box when sharing.

Stop sharing withdraws a page at once. The binder and the wishlist themselves are untouched. Only the link stops working.

Working out what two people can trade