Inspired by the card-based trading competition described in The Trading Game. Make a market and outsmart the table, just as Gary Stevenson did to win his internship.
Everyone holds a hidden card. The community cards fill in the truth. Your job is to quote a price others will trade against, and to be right more often than the bots.
You see your own card and shared community cards. Estimate fair value from incomplete information, while everyone else does the same.
Set your bid and ask with the spread slider. Tight markets win flow but carry risk. Wide markets stay safe but miss the action.
Trade against the bots' quotes when you spot an edge. Build a position and manage your risk, then settle up when the cards are revealed.
Play the fast lane, with a live order book ticking down on a clock and bots firing quotes in real time. Or slow it right down to a turn-based duel where every decision is deliberate.
Your card is yours alone. The edge goes to whoever reads the table best.
Naive, Bluffer, Analyst and more. Each bot has its own way of quoting, and its own tells.
Unlock milestones from First Flip onward and sharpen your trading record.
Never traded before? Learn real market-making intuition one hand at a time.
One table and a handful of hands. Perfect for a five-minute sharpener against the bots.
Climb four stages, from University Qualifiers to The Final, against progressively sharper desks at MegaBank. The first two stages are free; the final two unlock with Pro.
Guided and quick, with no jargon. Pick up bids, asks, spreads and edge before you sit at a real table.
Market Maker runs in your browser with nothing to install. It is the same game and the same bots. Open it on a laptop or desktop and take your seat at the table on a bigger screen.
The core game is free: Single Game, the Tutorial, and the first two career stages against standard bots. One optional £1.99 in-app purchase unlocks Market Maker Pro, which adds live trading mode, the final two career stages and the sharper Pro bots. There are no subscriptions and no ads, ever.
Buy Pro once and it's unlocked everywhere. Purchase on the App Store and it's there in your browser; buy it on the web and it unlocks on your iPhone. Just sign in with Apple so we can recognise you across devices.
Yes. Single Game, the Tutorial, and the first two career stages are completely free, with no time limits and no ads.
A one-time £1.99 in-app purchase unlocks Pro: live trading mode, the final two career stages (Stage 3 and The Final at MegaBank), and the advanced Pro bots.
Yes. Pro is a one-time £1.99 unlock that carries across iPhone and web. Buy it on the App Store and it unlocks in your browser; buy it on the web and it unlocks on your iPhone. Just sign in with Apple so we can recognise you on each platform.
None. There are no ads and no waiting for lives to refill. Download it and play as much as you like.
Not at all. The built-in tutorial teaches bids, asks, spreads and edge in plain language. Most players pick it up in a hand or two.
Yes. You play against AI bots on-device, so there's no login and no connection required.
Single Game is a quick session against the bots. Career Mode is a four-stage climb to earn the internship at MegaBank. The first two stages are free and the final two need Pro. The Tutorial walks you through the basics.
Market Maker is on iPhone via the App Store and runs in any modern web browser at southlondonsilicon.com/marketmaker. Both are free to play.
The trading floor is open. Free on iPhone and in your browser.
Disclaimer: This is a fan-made recreation inspired by the card game described in Gary Stevenson's book The Trading Game. Not affiliated with, endorsed by, or connected to Gary Stevenson, Penguin Random House, or any related parties.