Fear, Uncertainty, and Doubt. In trading, it’s the noise people throw at a position to make you second-guess it: “this is going to dump,” “you should have sold,” “I wouldn’t hold that,” rumor, panic, or vague negativity. The point of the line is: don’t let that chatter change your entry, size, or exit. You are responsible for your trade and your money. Have the conviction in your system.

Source: Sunrise Trader