The Mock Exchange

Learn markets by making them.

MOCKX is a real-time trading floor for people, not paper. Spin up a room, hand your friends a join code, and battle it out on a live order book — the way trading firms teach market making.

No install Free to host Join in seconds
Real-time engine Price-time FIFO matching Server-authoritative Live P&L Runs in the browser
What is MOCKX

A real exchange, sized for game night.

Under the hood MOCKX runs an actual matching engine — limit and market orders, price-time priority, partial fills, position limits. Nothing is simulated away. When you get filled, someone on the other side made you pay for it.

Every market needs a truth. In MOCKX, the host knows the instrument's true value and the players don't. Quote wide and you'll never trade; quote tight and you'd better be right.

01

HOST CREATES A ROOM

Pick a market type — binary event contract or standard instrument — set the round timer and position limits, and share the join code.

02

TRADERS TRADE

Everyone quotes and trades on a professional depth-of-market ladder — click to place, join, lift, or sweep a level. Keyboard-first, zero friction.

03

REVEAL & SETTLE

The host reveals the true value. Positions settle against it, the leaderboard updates, and the next round begins.

Built like the real thing

Everything a trading floor has.
Nothing a classroom needs to install.

match()

A real matching engine

Price-time FIFO order matching with partial fills, market orders, and self-trade prevention — the same rules real exchanges run on.

ladder

The DOM ladder

Trade from a depth-of-market price ladder like professional futures traders. One click to hit a bid, join a level, or sweep the book.

rounds

Host-run rounds

Timed rounds with pause, halt, and reveal-and-settle. The host is the referee: they set the contract, watch the floor, and call the close.

binary | standard

Two market types

Trade 1–99¢ binary event contracts that settle at $0 or $1, or free-form standard instruments where the market forms wherever you take it.

pnl

Live P&L and leaderboard

Marks to fair in real time, settles to truth every round, and ranks cumulative P&L across the whole session. Bragging rights included.

join(code)

Zero friction

No accounts, no downloads. Players join from any browser with a room code and a display name, and reconnect automatically if they drop.

Two ways in

Play with friends. Train against the house.

Live now

PLAY

Multiplayer rooms for game nights, trading clubs, and classrooms. One host, a room code, and a floor full of your friends fighting over the spread. Cumulative leaderboard across rounds.

Create a room
Coming soon

TRAIN

A solo training ground. Market-making bots quote on a live book and you trade against the exchange — tighten your spreads, manage inventory, and drill your P&L before game night. In development.

Preview
Why we're building this

Market making shouldn't live behind closed doors.

The market-making game is how trading firms interview and train: someone knows the true value, everyone else quotes two-sided markets and learns — fast — what adverse selection feels like. It's the best hands-on education in markets we know of, and today it mostly happens on whiteboards behind interview-room doors.

MOCKX turns that game into a real product: an actual exchange with an actual matching engine, playable by anyone with a browser. First a game you host for friends. Then a training ground with bots to practice against. Eventually, a place where anyone can learn to think in prices.

Trading is a skill you learn by doing — MOCKX is where you get to do it, before real money is on the line.