How to Set a Stop-Loss: 5 Methods Traders Use (With Examples)

What a stop-loss really does

A stop-loss is not a prediction. It is a decision you make before you enter a trade: "if price reaches this level, my reason for buying is no longer valid, so I will get out." Writing that level down before you click Buy turns a vague hope into a plan with a known worst case.

Without a stop-loss, a small loss can quietly become a large one. A stock bought at ₹500 that falls to ₹450 is down 10%. To get back to ₹500 it now needs to rise about 11%. If it falls to ₹250, it needs to double just to break even. Losses grow harder to recover the bigger they get, which is why most experienced traders care more about the size of their losses than the size of their wins.

On an exchange, a stop-loss order usually means a trigger price. When the market trades at or through the trigger, your order becomes a market order (SL-M) or a limit order (SL-L) and is sent for execution. In a fast fall the fill can be worse than your trigger; that difference is called slippage, and no method removes it completely.

Method 1: Percentage stop

The simplest method is a fixed percentage below your entry, for example 2% for an intraday trade or 5-8% for a swing trade. If you buy at ₹500 with a 2% stop, the stop is ₹490.

The advantage is that it is easy and consistent. The weakness is that it ignores the stock. A calm, large company may move 1% on a normal day, while a small, volatile stock can move 4% without anything changing. The same 2% stop can be too wide for one and far too tight for the other, so many traders use the percentage stop only as a starting point while they learn.

Method 2: Below support (structure stop)

Support is a price area where buyers have stepped in before, for example a level where the stock bounced two or three times in recent weeks. If you buy near support, a natural stop is a little below it. The logic is clean: if price breaks the level where buyers kept defending, the idea behind the trade has changed.

Place the stop a small distance below the support zone, not exactly on it. Round numbers and obvious lows attract many stop orders, and price often dips through them briefly before recovering. A buffer of a fraction of the daily range keeps you from being shaken out by that noise.

For a short (sell) trade the same logic applies upside down: the stop goes a little above resistance.

Method 3: ATR (volatility) stop

ATR, the Average True Range, measures how much a stock typically moves in one candle. A volatility stop is placed a multiple of ATR away from the entry, often 1.5x to 3x ATR. If a stock's 14-day ATR is ₹12 and you use 2x ATR, your stop sits ₹24 below the entry.

The benefit is that the stop adapts: volatile stocks get wider stops, quiet stocks get tighter ones. This is why ATR-based stops are popular in backtests and in systematic strategies. Because a wider stop means more rupees at risk per share, it should be paired with position sizing (buying fewer shares), which we cover in a separate article.

Method 4: Moving-average stop

Trend followers often keep a trade as long as price stays above a moving average, such as the 20-day or 50-day EMA, and exit when a daily candle closes below it. This is less a fixed price and more a rule: "the trend I was riding has weakened."

Using the close rather than the intraday low reduces false exits, but the loss can be larger than planned if the stock gaps down. Some traders combine both: a hard stop for disasters and a moving-average close for normal exits.

Method 5: Trailing stop-loss

A trailing stop moves in your favour as price moves in your favour, and never moves back. If you buy at ₹500 with a ₹10 trail, the stop starts at ₹490. When price reaches ₹520, the stop rises to ₹510. If price then falls to ₹510, you exit with a ₹10 profit per share instead of watching the gain disappear.

Trailing can be in points (₹10) or percent (2%). A tight trail locks profit early but exits on small pullbacks; a loose trail lets big moves run but gives back more at the end. There is no perfect setting, only a trade-off you should test.

Common stop-loss mistakes

Moving the stop further away when price gets close to it. This turns a planned small loss into an unplanned large one, and it is the single most common reason accounts shrink.

Placing the stop where the loss "feels acceptable" instead of where the trade idea is proven wrong. The market does not know your comfort level. Pick the level from the chart first, then choose how many shares to buy so that the loss at that level is acceptable.

Using the same stop for every stock and every timeframe. A 5-minute chart and a daily chart need very different distances.

Forgetting about gaps. A stock can open far below your stop after results or overnight news. For positions held overnight, size them assuming the stop might be filled worse than planned.

How to practise on iTradeChart

Open any stock chart and place a paper order with a stop-loss. You can add a bracket (stop-loss and target together, where one cancels the other), a trailing stop in rupees or percent, and a GTT order that stays active for days. All of it uses virtual money, so you can see how each method behaves on real price movement without risking anything.

You can also drag the stop-loss line directly on the chart, and use the Long / Short drawing tool to see the risk-to-reward of a plan before you place it. After a few weeks, the Report card shows whether your losing trades are getting smaller.