test_setup
Backtest a trading setup on every S&P 500 stock since 2017 and compare it with random days. rule: a formula in Trade Manager's language (see the server instructions), e.g. "rsi < 30". horizon_days: how many trading days after the signal to check (1-60, default 20). Returns how often the stock was higher after the signal vs random days on the same stocks (same year, never the signal's own month) and vs the stock's all-days rate, split by period, plus a plain verdict and recent examples. History, not a prediction.
rulerequiredhorizon_days