Many people heard of this advice "Buy low, sell high", but how exactly do we achieve that?[疑问] This post is for long-term investors who believe in DCA(Dollar-Cost Averaging).[开心] Fundamentals and TrendFirst, the stock we pick has to be a fundamentally good company and be on an uptrend from a long-term perspective. Information such as profitability, revenue, assets, liabilities, and growth potential are considered fundamentals.Example of a downtrend(Ref: $Robinhood Markets, Inc.(HOOD)$):Avoid stocks constantly making new ATL(All-Time Low)/52wk LowExample of an uptrend(Ref: $英伟达(NVDA)$):Look for stocks that have been making new ATH(All-Time High)/52wk HighBe Patient with