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Market Games

Eight browser games built on how traders actually think, and what trading interviews test for: price a market, weigh risk against reward, and know when an edge is worth taking.

Trading Game

Combine market making and market taking in a single round. Quote spreads, then trade against the book.

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ETF Arbitrage Game

Spot mispricings between an ETF and its underlying stocks. Trade against 3 AI market makers for P&L.

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Card Game

Classic card-based market taking exercise. Read quotes, identify edge, and take the best price.

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Market Making Dice Game

Quote tight two-way prices on dice rolls. Manage spread, inventory, and event risk.

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Fermi Estimation Game

Estimate unknown quantities with confidence intervals. Score for accuracy, precision and speed.

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YESNO

Event Contracts Game

Quote two-sided markets on binary events against noise and informed flow. Score on P&L and calibration.

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New

Higher or Lower Game

Call each card higher or lower and size every bet to your edge. Grow the bankroll without busting.

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10
10
New

Betting Board Game

Find the arbitrage in a board of odds. Work out the fair price of each bet and stake the lines that are wrong.

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Frequently Asked Questions

Learn how market making games prepare you for trading interviews and sharpen the skills prop firms screen for.

What are market making games?
Market making games are skill-based browser simulators built around the core tasks of a proprietary trader: quoting a two-way price, managing inventory and spread, and taking the other side when edge appears. They are designed to develop the same fast, probabilistic decision making that firms like Optiver, IMC, Flow Traders, SIG and Jane Street screen for during their interviews and trials.
Are these games free to play?
The easy difficulty of every game is always free and will stay that way forever, with no login required. A free account saves your scores and history; Tradermath Premium unlocks the Medium, Hard and Custom difficulties.
How do difficulty levels and scoring work?
Each game ships with easy, medium and hard difficulties, plus a custom setting on Premium. Stepping up shortens the time per decision and adds rounds, and what else changes depends on the game: market events switch on, helper information like your balance is hidden, or more of the traders you face turn out to know something you do not. Your best result per game and per difficulty is stored on the market games dashboard so you can track improvement over time, as P&L in the trading games and as a points score in Fermi Estimation and Event Contracts.
Will these games help with quant trading interviews?
Yes. The Trading Game and Market Making Dice Game drill the exact quoting and inventory questions that show up in Optiver and Flow Traders assessments. ETF Arbitrage mirrors the mispricing identification questions that are common at IMC and Jane Street. The Card Game reflects expected value questions asked by SIG. The Betting Board Game is the betting-odds round Optiver runs in its trading interviews: a board of quoted bets, a short clock, and the question of which prices are wrong. Fermi Estimation is a direct echo of the brainteasers used by almost every proprietary trading firm. Event Contracts covers the newest of these seats: turning a base rate and a piece of news into a probability, then quoting it two-sided against traders who may know more than you do.
Which skills does each game train?
Trading Game and Market Making Dice Game build spread discipline, inventory awareness and two-way pricing. ETF Arbitrage builds cross-asset pricing and reaction speed against competing traders. Card Game builds expected value intuition and edge detection. The Betting Board Game builds fast fair-odds arithmetic and the discipline to stake only where the price is wrong in your favour. Fermi Estimation builds calibration of confidence intervals and Bayesian updating under uncertainty. Event Contracts builds Bayesian updating in odds form, quoting in probability space, and the judgement of how wide to be when some of the flow is informed.
Do I need a finance background to play?
Not at all. The easy difficulty of each game teaches the core concept step by step, which makes the games well suited to students, career switchers and early-career traders. What matters most is comfort with quick mental math and probability, both of which the games themselves help you develop.