As the year nears the end, it is time to buy some stocks and ETFs at the dip and book your position in the recovery rally. This year has been harsh for TSX dividend stocks and exchange-traded funds (ETFs) but strong for tech stocks like Shopify and Constellation Software. It reminds you of the lesson of buying the dip. When you see that Shopify’s stock price has doubled since January 1, and Constellation is trading above $3,000, you might wonder, “What if I had bought them during the dip?” How do we implement the buy-the-dip strategy? While I took the…