Trailing Stop Price Calculator

About this calculator

A trailing stop is a stop-loss order that moves up automatically as a stock’s price rises, but never moves back down, so it locks in gains while still giving the position room to keep running. For a long position, the current stop level is trailing stop price = peak price × (1 − trail %) — recalculated every time a new peak price is reached, and the position is sold if the market price ever falls to that level.

Active traders and swing traders use trailing stops specifically to avoid the two classic mistakes of manual exits: selling too early out of fear and giving back gains by holding too long. Because the stop trails a fixed percentage (or dollar amount) below the highest price reached since entry, it locks in a growing floor of profit automatically without requiring the trader to watch the position constantly or predict a top.

This calculator takes your entry price, the peak price reached so far and your trail percentage, and returns your current stop level along with the gain it has locked in, so you always know exactly where your exit sits.