It is better to do it the other way around, buy when it is down and sell when it is up.
But for this, you have to study the patterns and do deep research.
A good idea is to educate yourself in trading and then explore the methods, an attractive option is to use the stormgain app that offers you a free trading account with which you can make operations in the real stock market without investing your money, this helps a lot to earn experience and prepare to enter the world of trading, the Filipinos I know recommended this method and it seems to be a good idea in which you do not risk anything and learn.
That's the ideal, always start trading on demo account, to test strategies, before moving to the real one.Hi @reinaldoverdu