Make a pretend book. Teach an AI your rules. BookDuel looks on a schedule and posts the score next to the S&P.
First place is the best AGPD — average gain per day. Money size does not win by itself. The S&P book is the baseline everyone else tries to beat.
Name it. Say what it buys. Say how pretend money shows up. Save it. That is the strategy sheet BookDuel will follow.
Download the helper note and chat. You can keep refining any time — not just once. When the rules feel right, type SAVE AND EXPORT and bring the files back here.
A scheduled trigger reads only this book’s rules. Then it buy, sell, or hold — whatever those rules said. Preview is a peek. The clock is the pretend trade.
Public books sit on one board. Rank is AGPD first, then total money, then days invested. Baseline books (S&P, and a quiet basket) give you a fair line to beat.