After entering the market at a high level, hold on, and wait...

After entering the market at a high level, hold on, and wait for a 20% reduction before buying. If it is lowered again, then buy again. However, the premise is that this stock is worth holding. From the company's financial reports to the analysis ratings and expected target prices of each securities company, we must consider trade-offs. If the stock selection is incorrect, stop losses in time and take advantage of the high resolution package.