Be the Market
MOCKX is an order-book exchange that runs in your browser. Spin up a room, hand out a join code, and battle it out on a live book. Or train against the market-making bots, or play the monthly tournaments.
A real exchange that makes you a better trader
MOCKX runs an actual matching engine: limit and market orders, price-time priority, partial fills, position limits. When you get filled, someone on the other side made you pay for it.
And you get both sides of the craft. Trade live against real people, or against bot market makers quoting a live order book on easy, medium, and hard. Then climb the global leaderboard.
HOST CREATES A ROOM
Design a custom market: a binary event contract or a standard instrument. Or pick a built-in MockX Game. Make the room public or share the private join code.
TRADERS TRADE
Everyone quotes and trades on a depth-of-market ladder. Place, join, lift, or sweep a level with one click or key press.
REVEAL & SETTLE
The host reveals the true value. Positions settle against it, the leaderboard updates, and the next round begins.
Real exchange machinery, running in a browser tab
A real matching engine
Price-time FIFO order matching with partial fills, market orders, and self-trade prevention.
The DOM ladder
Trade from a depth-of-market ladder, the same tool futures traders use. One click hits a bid, joins a level, or sweeps the book.
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.
Your markets or ours
Design your own market line: a binary event or a standard instrument on anything you can settle. Or host a built-in MockX Game from a library that grows every week.
Live P&L and leaderboard
Marks to fair in real time, settles to truth every round, and ranks cumulative P&L across the session.
On the floor in a minute
Sign in with Google, pick your trader username, and join with a room code or with one click from the open games lobby. There is nothing to download, and you reconnect automatically if you drop.
Play with friends. Train against the house. Compete with the world
PLAY
Multiplayer rooms for game nights, trading clubs, and classrooms. Design your own market line: a binary event or a standard instrument on anything you can settle, or host a built-in MockX Game. Public rooms anyone can join, private rooms by code, and a cumulative leaderboard across rounds.
Create a roomTRAIN
A solo training ground. MOCKX's market-making bot quotes a live order book and you trade against the exchange: tighten your spreads, manage inventory, and drill both market making and position taking across difficulty levels. Free accounts get a daily session per game, and the globally ranked TRAIN P&L leaderboard is live.
Start trainingCOMPETE
Monthly tournament seasons on a live matchmaking ladder. A free-for-all open to every trader and a members league with tougher market conditions, one featured game each month, seasonal rank points, and a Hall of Fame that remembers its champions.
First season soonBuilt for people who think in prices and probabilities
Pivoting into quant finance
The market-making game is how trading firms interview. Rehearse the real thing before you are across the table from a trader: quote two-sided, manage inventory, and survive adverse selection. Every round is interview reps, and you learn to update on new information in seconds and to explain your P&L afterwards. Walk in having actually done it, not just read about it.
Prediction-market traders
Trade binary contracts against live opponents and learn to price probability under pressure. It is the same muscle behind every event-market edge, minus the fees and the bankroll risk. Practice updating your odds as information drips in, sizing positions around your edge, and getting flat when the market clearly knows more than you do.
Student trading clubs & competitions
The best way to learn trading in a low-stakes environment. Run weekly club games and university trading competitions on one dedicated platform. Custom licenses and partnerships are available: reach out at hello@mockx.org to make MOCKX the home floor for your club and every competition you host.
Seasoned traders & desks
Run internal games for your desk or team. Custom contracts on anything you can settle, position limits you control, and a P&L column that settles all arguments. When the desk clears out, it's a low-stakes way to keep the craft sharp and prove your reads on a live book.
Real trading practice shouldn't live behind closed doors
MOCKX started as an internal tool. We first built it for our own trading club at an Ivy League school: a private floor where members ran mock markets against each other instead of risking real money. The market-making game is how trading firms interview and train, where someone knows the true value, everyone else quotes two-sided, and you learn fast what adverse selection feels like.
Then it clicked that our club wasn't the only place that wanted this. Prediction markets are taking off and there's nowhere good to practice. Most retail traders have never worked a real order book. And people have always liked trading against each other, whether for money, for fun, or to settle some argument nobody can otherwise win. So we opened the floor to everyone. The kind of practice that used to sit behind trading desks and invite-only clubs is open to anyone now, and any community that wants to build around it can make MOCKX their home floor.
Today MOCKX is a real exchange, open to anyone with a browser. Trading is a skill you learn by doing, and this is where you get to do it before real money is on the line.