World XPay vs Quant Academy

FRAUD-PROOF This is the only guaranteed fraud-proof payment app in the world! XPay protects you against transaction fraud, card theft, hackers, and even lost cards. XPay changes the way your cards interact with merchants, acquirers and banks on the financial networks. A technology so powerful, it's guaranteed to be transaction safe (our lawyers cringed at first but then agreed). PRIVACY XPay also provides you with more privacy than any other payment method or eWallet. When you shop where you see the XPay logo, you'll automatically have increased financial privacy and faster check-outs. Since we just started rolling out in the US in 2020, accepted locations are growing everyday. Visit our website for merchant lists, employment opportunities and how to accept XPay at your store (world-xchange.com). EASIER AND FASTER Whether standing at the check-out or online, you'll enjoy being in control and the efficiency of the whole payment process. When online, you'll never have to fill-out another long and painful form. This is because you control the shopping cart and communication with your bank. This is the way shopping was supposed to be, with you controlling the access to your money (radical we know). DON'T MISS A THING All this added simplicity, privacy and protection using your same cards and all the perks and rewards you currently enjoy with each one. XPay doesn't change your cards, it changes how they work, making them safer, easier and more private. For more information about this amazing technology, our company, career opportunities, future territory and language roll-outs, please visit: world-xchange.com.

Quant Academy is your pocket-sized path to quantitative finance. Whether you're a student exploring quant trading for the first time or preparing for interviews at top firms, this app breaks down complex topics into clear, interactive lessons you can finish in minutes. STRUCTURED LEARNING PATH Work through 10 modules and 100 lessons covering everything from market fundamentals to advanced quant research: • Markets 101 — Stocks, ETFs, futures, options, and how exchanges work • Probability — Expected value, variance, distributions, and Bayes' theorem • Statistics — Correlation, regression, hypothesis testing, and more • Python for Quants — NumPy, Pandas, and data analysis with interactive code • Backtesting — Strategy testing, overfitting, and walk-forward analysis • Technical Factors — Moving averages, RSI, momentum, volatility, MACD • Quant Research — Signal generation, hypothesis formation, and alpha evaluation • Market Microstructure — Order books, market making, slippage, and HFT • Math for Quants — Linear algebra, calculus, optimization, stochastic processes • Interview Prep — Coding, probability puzzles, mental math, and brain teasers INTERACTIVE SIMULATIONS Go beyond theory with hands-on tools: • Strategy Builder — Create buy/sell rules and run backtests instantly • Order Book Simulator — Place orders and watch the book react in real time • Exchange Simulator — Act as a market maker on a simulated exchange • Coin Toss Simulator — Explore probability with thousands of trials • Stock Comparison — Visualize correlation and covariance between assets LEARN BY DOING Every lesson includes rendered math formulas, interactive code examples with editable parameters, and quick-check quizzes that test your understanding before you move on. INTERVIEW PRACTICE Sharpen your skills with categorized problems across coding, probability, math, brain teasers, and systems design — the exact topics asked at quant firms. TRACK YOUR PROGRESS Earn XP for completing lessons and quizzes, level up, and unlock achievements as you build real quantitative intuition. • 100 lessons across 10 modules • Quizzes with instant feedback and explanations • XP system with levels and achievements • Works completely offline • Dark mode support Built for aspiring quants, finance students, and anyone curious about how markets really work.