How to Set a Stop-Loss (and Actually Use It)

If there is a single habit that separates traders who last from those who blow up, it is this one. A stop-loss is dull, it is unglamorous, and it is the reason experienced traders survive their bad calls. Here is how to set one and, harder, how to actually respect it.

A stop-loss is an order that automatically closes your position if the price hits a level you set, capping the loss. You decide in advance the most you are willing to lose on a trade, and the exchange enforces it for you, even while you sleep or panic. It turns an open-ended risk into a known, survivable one.

Set the stop based on where your trade idea is proven wrong, not on how much pain you can stomach. If you are long because a price level should hold, your stop goes just below that level. Then size the position so that hitting the stop only costs a small slice of your balance, not a life-changing one. Place the stop before you enter, when your head is clear, not after, when it is not.

Three habits kill the whole point of a stop. Moving it further away because the trade is going against you, which just enlarges the loss you were trying to cap. Setting it so tight that normal noise knocks you out instantly. And the worst one, not using it at all and 'watching closely' instead. If you take nothing else from this: a stop you honour beats a perfect entry you do not.