Guide · Risk Management
What Is a Stop-Loss? A Beginner's Guide to Limiting Risk
A stop-loss is one of the simplest risk management tools in trading — and one of the most commonly ignored by beginners. Here's what it actually does.
A stop-loss is an instruction to close a position automatically once it loses a certain amount, or a certain percentage of its value. The idea is simple: decide in advance how much you're willing to lose on a trade, so a single bad move can't spiral into a much larger one while you're not watching.
The key word is automatic. Without a stop-loss, closing a losing position requires a human decision in the moment — and human decisions under pressure are exactly where discipline tends to break down. Traders hold on hoping for a reversal, watch a small loss become a large one, and rationalize it as 'just waiting it out.' A stop-loss removes that decision from the heat of the moment and makes it in advance, when thinking is clearer.
There's no universal 'correct' stop-loss size — it depends on the asset's normal volatility and how much of your total capital you're willing to risk on one idea. A common approach is to risk a small, fixed percentage of total capital per trade (often 1-2%), then size the position so that the stop-loss distance matches that risk budget, rather than picking a stop-loss level first and figuring out risk after.
Trade2Spike's Long Term mode builds this in directly: every 48-hour position carries an automatic 8% stop-loss, so you can practice thinking in terms of maximum acceptable risk — with zero real money on the line — before ever using the concept with an actual account.