At what point does the fund decide to stop, it depends on what fund the investor is investing in. If it is an index fund with fixed investment, it depends on the corresponding index. Actually, it's not the point, it's the trend. When the corresponding index moves to the right, the investment of the fund can be stopped.

Active management funds can only look at the performance trend of the fund. When the fund performance looks to the right, it can stop fixed investment. After entering the right side, continued fixed investment will increase the cost of holding positions, so the right side is not suitable for fixed investment.