Let us go back to the period of February to March 2020; both the Straits Times Index (STI) and S&P 500 had dropped around 20-ish percent, and you were wondering if the said indices would go down further. Assuming that you had held their respective exchange traded funds (ETFs) and wanted to add more, it would be natural to get them at the lowest price before they head upwards to recovery.

If you had bought into them on the day it went to the lowest (29 Mar 2020 for STI and 15 Mar 2020 for S&P 500, based off the graphs on Yahoo Finance), congratulations, but then my next question