Template library
Excel workbooks and checklists with working formulas, ready to use. Free downloads need no checkout; premium products are delivered via Gumroad.
Sample-size worksheet
Excel workbook: two-proportion sample size with working formulas, dropout adjustment included.
Download → Free downloadInvestor stats cheat sheet
Three-page PDF: breakeven win rates, position sizing, volatility drag, reverse valuation, backtest significance.
Download → PremiumAutomated Stock Valuation Suite
Type one ticker: live prices, four valuation methods, a full DCF model, risk stats, tracker, and earnings watch. Built for Google Sheets. Delivered via Gumroad.
View → Available SoonStatistics and Data Analysis for Investing and Trading
A full textbook by John M. Charles, MS, Statistician. In the works now.
Preview →The Investor Stats Cheat Sheet
A free three-page PDF: breakeven win rates, stop-loss sizing, volatility drag, reverse valuation, and how to tell a real track record from noise. Plus new tools as they ship.