Field notes — Batuhan Odabasoglu https://batuhanodabasoglu.com/notes Short notes on building Fulcrum: engineering, forward testing, and the discipline behind automated investing. en Forward testing: proving it in the open https://batuhanodabasoglu.com/notes/forward-testing-in-the-open https://batuhanodabasoglu.com/notes/forward-testing-in-the-open Sun, 05 Jul 2026 09:00:00 GMT A backtest is a hypothesis. Live paper trading is the first honest test. Here's why I'm running Fulcrum on simulated trades before a single real dollar goes in. The two kinds of loss https://batuhanodabasoglu.com/notes/two-kinds-of-loss https://batuhanodabasoglu.com/notes/two-kinds-of-loss Wed, 10 Jun 2026 09:00:00 GMT There's the loss the market hands you, and the loss you hand yourself. I can only design around one of them — so I did.