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The stop belongs where your idea breaks
A stop is not "how much I agree to lose". It is the price at which your reason for entering stopped existing. Everything else is guessing.
There are two ways to place a stop. First: "two percent down, I can live with that". Second: "I entered because price held 62,000; if it goes below, I was wrong — the stop belongs there". The first puts the stop where it is comfortable for you. The second puts it where the market proves you wrong. Only the second works.
Why "minus two percent" fails
Such a stop has no connection to the market. Sometimes it lands in the middle of ordinary daily noise and you get knocked out by accident; sometimes it sits far beyond anything reasonable and you sit through a real loss. The market does not know what you can live with and will not adapt to it.
Two coins, one percentage, different meaning
BTC travels 1.9% in a day. A 2% stop sits inside ordinary daily breathing — it will be taken out for no reason connected to your idea. A small coin travels 12% a day. The same 2% stop will not survive an hour there. The identical percentage means "too close" on both, for different reasons, and both positions die from something other than a flaw in your analysis.
Where a stop makes sense
- Beyond the level you entered from: below support in a long, above resistance in a short.
- Beyond a structural extreme: under the last significant low if you bought a bounce.
- Beyond the edge of the pattern or range the breakout came from.
- Beyond the signal candle if the entry came from it — with room, not touching.
Room is mandatory
A stop EXACTLY at the level is a bad idea, and not for mystical reasons. Everyone sees the level, other people's stops pile up beneath it, and price regularly dips a few ticks deeper, sweeps them and turns. Sensible room is a fraction of the instrument's daily range: if daily ATR is 3%, then a quarter to a third of it — 0.75–1% below the level. You pay a small price to avoid being carried out with the crowd.
Moving the stop toward the loss
Price approaches the stop and the person moves it away: "just a little more, it will turn now". At that moment a substitution happens: a trade designed to risk $50 becomes a trade with unknown risk, and every earlier calculation is void. One such case in twenty can eat the profit of the previous nineteen. A stop may be moved ONLY toward profit, never the other way.
Break-even stops are not always good
Moving the stop to entry looks like free protection, but it has a cost: price regularly returns to the entry before going your way, and you exit flat from a trade that was going to pay three risks. A sensible rule: move to break-even not "when it feels right" but after price has travelled a pre-set distance — usually one to one and a half risks.
The ratio of potential profit to risk. Below two the trade is usually not worth taking: at a 50% hit rate such a system treads water at best, and once fees are included it goes negative. Compute it BEFORE entering: afterwards the target starts adjusting itself to your wishes rather than to the chart.
In paper trading the stop and target are placed together with the position and drawn as lines on the chart — you can judge the ratio by eye immediately. Practise in replay: run ten entries placing stops by level and see how many survived.
About paper tradingFind your instrument's usual overshoot
Take the instrument you trade. Find ten occasions in history where price broke a level and came back. Measure how deep it went past the level each time and take the largest of the ten. That is the room your stop needs on this instrument — and it is unlikely to equal two percent.
Entry 100, stop 96, target 105. Worth taking?
The ratio is (105 − 100) ÷ (100 − 96) = 1.25. Below two, so usually not. Two options: find an entry closer to the stop to shrink the risk, or pass. The third option — "I will move the stop closer so the ratio improves" — is the most common and the worst: it does not improve the trade, only your chance of being knocked out by noise.
Why can you not place a stop "where it does not hurt"?
Because "does not hurt" is about you, and a stop must be about the market. It answers "at what price did my idea stop being right", not "how much can I stand". The amount you can live with is set by position size, not by the stop: the stop decides WHERE, the size decides HOW MUCH.