$Alphabet(GOOGL.US)A good company still needs to wait for a good price before buying. Tides rise and fall. Selling high and buying low is one choice, while steadily holding and growing with the company is another style. I choose to keep my core position unchanged while selling high and buying low. In summary, it's about trading within the P/E range of Google over the past few years, keeping the core position to avoid missing out on the market, and using a rolling position to profit from price differences while lowering the cost basis. After the capital flow grows, expand the core position. In this round of Google's pullback, I bought at 349 and 336 respectively. If the market gives the opportunity, I will continue to buy lower, until the preset position for Google is fully allocated. Only when the bottom of the range is reached or signs of stabilization appear will I consider long calls.