You planned to lose $50 on a trade and you lost $150. There was no crash and no bad luck, only a that was moved twice "to give it more room". A stop-loss closes your trade automatically at a price you chose in advance. Used well, it is the difference between a bad trade and a lost account.
Before we start: what do you think?
You want to lose no more than $20 on a gold trade. How should you choose where the stop goes?
✗ That puts the stop where your budget ends, not where your idea is wrong, so normal price noise often hits it.
✗ A very tight stop gets hit by normal movement, even when your idea was good.
✓ Right: the chart chooses the stop, and the position size makes that distance cost $20.
✗ Without a stop you decide under stress, and a fast move can take you far past −$20.
How a stop-loss works
A stop-loss is a . A pending order is an instruction that waits on the 's server until the price reaches a level you set. When the price touches your stop level, the order becomes a and the trade is closed at the next available price.
For a , the stop sits below your entry. For a , it sits above it.
Worked example: A buy trade on gold with a stop at 4,040
You buy gold (XAUUSD) at 4,050 and place a stop-loss at 4,040. If the price falls to 4,040, the platform closes your trade. You do not need to watch the screen or decide under stress. The decision was made earlier, when you were calm.
The stop also makes the 1% rule real. The rule says how much money you are willing to lose. The stop says where on the chart that loss happens.
Quick check
You open a sell trade. Does your stop go above or below your entry?
Where to place it: where the idea is clearly wrong
Every trade starts with an idea.
Worked example: Finding the stop on a gold bounce
Your idea: "Gold has bounced from 4,040 twice this week, so buyers seem to defend that level." The stop goes at the price that proves this idea wrong. Here, that is a little below 4,040, for example 4,035. The small extra distance leaves room for normal price noise.
Common places for a stop:
- Beyond a recent swing low (for a buy). A swing low is a point where the price turned up after falling.
- Beyond a recent swing high (for a sell). A swing high is a point where the price turned down after rising.
- Beyond a level the market has respected before, such as a clear or resistance zone.
Do not choose the stop from the money you want to risk ("I want to lose only $20, so my stop is 2 dollars away"). A stop that is too tight will be hit by normal movement, even when your idea was good.
The right order is:
- Find where the idea is wrong. That is your stop.
- Measure the distance from entry to stop.
- Calculate the so that this distance costs your planned risk.
Step 3 is explained in How to calculate your lot size. A wide stop means fewer , a tight stop means more. The risk in money stays the same.
Quick check
In what order do you set the stop and the position size?
Never moving it further away
When a trade moves against you, there is a strong temptation to move the stop further away "to give it more room". This feels like patience. It is actually increasing your risk after the trade has already shown you it may be wrong.
If you planned to lose $50 and move the stop twice, you might lose $150. Do that often and the no longer exists.
A simple rule: a stop can move in the direction of your trade, never against it.
Moving the stop to your entry price after the trade has moved in your favour is called "". It is a common choice, but it is a choice with trade-offs, not free money. You will not lose on that trade if the price comes back. But normal pullbacks will also close many trades at zero that would have reached the target. If you use it, decide the rule in advance (for example "after the price has moved the same distance as my stop") and test it in your .
Quick check
Once a trade is open, which way may you move the stop?
Slippage and gaps: when the stop fills worse
A stop-loss is not a guarantee of the exact price. It is an instruction to close the trade once the price reaches your level. The fill (the price you actually get) can be worse.
Slippage means getting filled at a worse price than your stop. It happens when the market moves very fast and there are no buyers or sellers at your exact level.
Worked example: Slippage on a gold stop
Your stop is at 4,040, but the price jumps from 4,042 to 4,036 in one tick. Your trade may close at 4,036, so you lose more than planned.
Gaps are a bigger version of the same thing. A gap is when the price opens far from where it closed, with no trading in between. This often happens:
- After the weekend, when markets reopen on Monday.
- Around big news, such as decisions or major economic data. (See When gold moves.)
Worked example: A weekend gap on gold
Gold closes Friday at 4,060 and opens Monday at 4,020. A stop at 4,040 cannot be filled at 4,040, because no trading happened there. It is filled near 4,020.
Some brokers offer , which close the trade at your exact level even in a gap. They usually charge a fee or a wider for this. Check your broker's terms if this matters to you.
You cannot remove , but you can reduce its impact: use smaller risk around big news, avoid large positions over the weekend, and expect your real loss to be a little bigger than planned sometimes.
Quick check
Does a normal stop-loss guarantee that you exit at your exact price?
Key takeaways
- A stop-loss is a pending order that closes the trade at a price you set before entry.
- Place it where your is clearly wrong, then size the position from that distance.
- Never move a stop further away from your entry. Break-even is a choice with costs, not free money.
- Slippage and can fill your stop at a worse price. A normal stop does not lock in an exact price.
Try this
Open a chart of gold or EURUSD on a free charting site or a . Pick a recent swing low. Imagine a buy trade above it and mark where your stop would go. Write the entry, the stop and the distance between them. Do this for three different setups. You are practising the first step: finding where the idea is wrong.