What changed

• Account curve: Choose “from when” and look at 1, 3, or 5 years, or choose a monthly amount. Each month sets aside a fixed sum. Sweet Spot spends the cash it has not used at the next entry. If that month has no entry, the cash waits. SPY is bought and held every month. Both views mark the deepest drop and how long it took to regain the prior peak. A 5-year start can include the training period, shaded and labeled, and that stretch is left out of the result. A position already open on the first day is not a new buy.
• Amounts: In Chinese, account amounts of 100 million or more are shown in 億. Smaller amounts stay in 萬.
• Challenge the AI: It sits on the homepage. Each round is one real year, and the stock name stays hidden. At the end you see the stock and the dates, and a note that this is real history. In some years Sweet Spot does not finish ahead of monthly investing or SPY.
• AI 選股: Each month, keep the 5 stocks that rose the most over the past year among the stocks that trade the most. Half of the account is split evenly across those 5. The other half is gold. The chart is cumulative return, next to SPY. SPY is the price only and excludes dividends. This is a historical backtest, not live results.

Other

• The homepage has an account card that names the stock and the span. The curve compares buying on the suggested entries with investing the same money on a schedule. The earlier training period is marked and left out of the result.