In Green Arrow, you can still buy it, which has an impact on the holding rate of return, because the cost has increased, the income has been diluted, and the yield will decrease, but the previous income has not changed. Later, if it continues to rise, the yield will increase, and the income will increase even more because of the increase in principal. Similarly, if it falls, the rate of return will decrease and the income will decrease even more.

Question 2: As you can see, the green arrow is still below the peak, so buy it at the position of the green arrow. If it is sold at the peak in the later period, there will still be income, and the income will increase additionally. Similarly, they are all sold at peak hours. Buying at Green Arrow is more profitable than not buying at all.

The rate of return is declining.