Now I always trade with a stop-loss in mind. I still buy when the price goes up, and sell when the price goes down. Rather counter-intuitive, I guess, to the worshippers of the "buy low, sell high" mantra. I also invest with a longer term horizon of five to ten years. Yeah, I know. If I am an influencer for a trading platform, I would lose 99 percent of my followers, just by mentioning my investment horizon. I do, however, allocate a portion of my funds for shorter-term trading, usually with the help of 1-day timeframe charts. I no longer set a target price for selling, preferring instead to "let the profits run". I only sell when my stop-loss is triggered.
BrandNewFunk : This is most helpful I especially liked that saying “thou shalt not sell lest thou hast gain” not exactly how you stated but I copied it and paste in my notes
Moogoorooloo OP BrandNewFunk : I like to sell only after making gains too. But sometimes my trades turn out bad. When they do, I would rather cut my losses early. A small loss is always better than a big one.
If your trading plan works for you, stick to it. May you have lots of gains.