Tools

A backtesting tool that runs entirely in the browser — no installation required, just open and use. Core Features GJR-GARCH(1,1) + Student-t Data Generation — Generates simulated market data with realistic statistical properties (fat tails, volatility clustering, leverage effect) 8 Market Presets — Steady Bull, Choppy, Bull-to-Bear, V-Shaped Recovery, Black Swan, Earnings Season, Breakout, High Volatility Multi-Timeframe Support — Daily / 4H / 1H / 15min / 5min / 1min Full Backtest Engine — Market / Limit / Stop / Stop-Limit orders, supports both long and short trading Strategy Editor — Syntax highlighting, autocomplete, syntax check, with built-in strategy templates Visualization — Candlestick chart (with buy/sell signal markers), equity curve, drawdown curve Save/Load Strategies — Save current strategy locally, load from local files Data Generation Algorithm Uses a GJR-GARCH(1,1) model with Student-t distribution to generate price series, reproducing the stylized facts of financial time series summarized by Cont (2001): ...

An interactive reader for the “44 Harsh Truths About Human Nature” interview between Naval Ravikant and Chris Williamson (Modern Wisdom Podcast), with a built-in vocabulary lookup designed for SAT and standardized test preparation. Why This Exists Reading authentic English content is one of the most effective ways to build vocabulary for the SAT and similar standardized tests. But constantly switching between a reader and a dictionary breaks the flow. This tool solves that by embedding an SAT-focused word bank directly into the interview transcript. Every test-relevant word is highlighted in context — click it and you instantly see its definition, without leaving the page. ...

I’m sharing an option pricing calculator I built that supports both European and American style options with full Greeks calculation. Features Pricing Models: Black-Scholes for European options, Trinomial tree for American options Full Greeks: Delta, Gamma, Vega, Theta, Rho and more Implied Volatility: Calculate IV from market price Intraday Precision: Supports trading hours and current time for precise DTE calculation Trading Days Mode: Option to use trading days (excludes weekends and holidays) instead of calendar days Dividend Support: Add discrete dividends with ex-dividend dates Holiday Calendar: Customizable holiday list for accurate trading day calculation How to Use Enter the option parameters (trade date, expiry, spot price, strike, volatility, etc.) Choose between Call/Put and American/European style Configure trading hours and holidays if needed Click “Calculate” to get the option price and Greeks Use the “Implied Vol” tab to calculate implied volatility from a market price Try It Out Click the link below to open the calculator: ...