A stop-loss is a decision made in advance about when you will admit you were wrong. That is its real function — not risk elimination, but removing the decision from the moment when you are least capable of making it well.
Three ways to place one
| Method | How | The problem with it |
|---|---|---|
| Fixed percentage | Always 5% below entry, on everything | Wrong in both directions. Too tight for a stock that routinely moves 4% a day, absurdly loose for one that moves 0.8%. |
| Volatility-based (ATR) | 1.5–2.5× the stock’s Average True Range below entry | Adapts automatically to each instrument. Requires you to look up ATR, which is the only real cost. |
| Structural | Just below the last swing low, support zone, or pattern extreme | The most logical — price going there means your reason for entering is gone. Requires judgement, and the distance varies by trade. |
The three things a stop cannot do
- It cannot survive a gap. If a stock closes at ₹500 and opens at ₹390 on a fraud allegation, your ₹480 stop fills near ₹390. There was no trading in between for it to catch. No stop type changes this.
- It cannot help in a lower circuit. If the stock is locked with no buyers, your sell order queues. You are not choosing to hold — you cannot sell at all. This is a specific and real Indian smallcap risk.
- It cannot protect you from yourself. A stop you cancel is not a stop. Traders who repeatedly move stops lower discover the mechanism only works if you let it.
Resting order or mental stop?
- Executes without you, at 11am on a day you are in a meeting.
- Removes the moment of weakness entirely.
- Essential for anyone who cannot watch the screen.
- Visible to the market in aggregate — stops do cluster at obvious levels.
- Avoids being picked off by a brief intraday spike through the level.
- Lets you use the closing price rather than any touch of it.
- Requires genuine discipline that most people do not have.
- Becomes "let me give it one more day" alarmingly easily.
Investors and stops
A long-term investor who has researched a business and bought it at a discount to their estimate of value has a genuine argument against a price-based stop: a 20% fall on no news is an opportunity to buy more, not a signal to sell. That argument is legitimate — but only if two conditions hold.
- You wrote down what would prove you wrong, and it is a business condition rather than a price condition.
- Your position is small enough that being completely wrong is survivable, because without a stop that is your only protection.
The dangerous position is the middle: someone who entered on a chart pattern, has no fundamental thesis at all, and reclassifies themselves as a long-term investor the moment the trade goes against them. That is not investing — it is timeframe drift with a respectable name.
You place a 4% stop on a stock with an ATR of 6% of its price. What is most likely to happen?
Ghar mein alarm laga hai — achhi baat hai. Par agar aag ekdum se bhadke, alarm bajne se pehle hi nuksaan ho sakta hai. Stop loss bhi wahi: normal din mein bachata hai, gap wale din nahi. Isiliye stop pe poora bharosa mat karo — size chhoti rakhna asli bachaav hai.
- A stop is a decision made in advance, when you are still thinking clearly.
- Fixed-percentage stops are wrong in both directions. Use ATR or structure.
- No stop survives a gap or a lower circuit.
- Position size, not the stop, is your real risk control.
- A stop-on-close entered as a GTT captures most of the benefit of both mental and resting stops.
Mark it done to track your progress through the curriculum.
Common questions
Short, direct answers to what people ask about this topic.
- gap risk meaning stop loss
- Gap risk is the risk that a stock opens far below your stop level, so the order fills at whatever the market is offering rather than at the price you set. A stop at ₹95 on a share that opens at ₹78 sells at around ₹78. Stops do not operate overnight or through a corporate announcement, and this is the honest limit of what they protect you from.
- why does my stop loss keep getting hit before the stock moves up
- Usually because the stop sits inside the share’s normal daily noise instead of outside it. A fixed percentage ignores how much that particular stock routinely travels in a day, so a volatile counter triggers it on ordinary fluctuation. Being taken out repeatedly just before the move continues is called a whipsaw, and each round costs you charges as well.
- a stop placed at a distance based on how much a stock normally moves is called a
- Volatility stop, usually built from ATR — the average true range. Instead of a flat 5% or 10%, the distance comes from the stock’s own typical daily movement, so a quiet largecap gets a tighter stop and a volatile smallcap a wider one. The quantity is then adjusted so the rupee risk stays the same either way.
- is a mental stop loss as good as a real one
- A mental stop only works if you actually act on it, and the moment it is hit is precisely the moment you will find reasons not to. Its one advantage is that an intraday spike cannot trigger it; its weakness is that it depends on discipline exactly when discipline is scarcest. Either way, the level should be decided before you enter, not while watching the price.
- what percentage should a stop loss be
- There is no single correct percentage, and a fixed one is wrong in both directions — too tight for a volatile smallcap and too loose for a steady largecap. The distance should come from where the idea is proven wrong or from the stock’s own volatility, and the quantity is then set so the rupee loss stays within your fixed risk per trade.