Stop Loss Strategies
Proper stop placement protects capital while giving trades room to work.
Stop Loss Methods
1. Structure-Based (Recommended)
Place below swing low (long) or above swing high (short). Respects market structure with a clear invalidation point.
2. ATR-Based
Long example: Stop = Entry - (ATR × Multiplier); mirror for shorts. Select the ATR estimator and multiplier in training data and freeze them.
3. Support/Resistance Based
Place beyond (not at) key S/R zones. Below support for longs, above resistance for shorts.
4. Moving Average Based
Place below key MA (20, 50, or 200). Dynamic stop level, good for trend following.
5. Percentage-Based
Fixed % below entry. Simple but ignores structure -- use only as a position sizing limit.
Stop distance must follow the setup's invalidation and executable volatility/liquidity, not a universal percentage for a trade label. Recalculate quantity whenever the stop changes.
Buffer Rules
Define the buffer in ticks, spread, and/or ATR and calibrate it by instrument, session, and order type. The purpose is to represent noise and execution uncertainty; do not infer a "stop hunt" from a stopped order.
Stop Management
Initial Stop: Set at entry based on analysis. Based on the invalidation point for the trade thesis.
Breakeven Stop: Treat moving to entry as one candidate management rule. It is not risk-free after fees, spread, gaps, and slippage; compare it with the unchanged initial stop out of sample.
Trailing Stop: Locks in profits as the trade progresses (see trailing-stop skill).
Workflow
- Identify invalidation -- the price level where the trade thesis is wrong
- Choose method -- structure-based for most setups, ATR-based for volatile assets
- Add buffer -- use the prevalidated tick/volatility and execution buffer
- Choose order mechanics -- stop-market prioritizes execution; stop-limit controls price but may not fill; confirm venue trigger source
- Manage -- follow the predeclared static, breakeven, time, or trailing rule
Evidence and Validation
- Treat the setup as a testable hypothesis, not a prediction. Define thresholds, entry, invalidation, and exit before evaluating outcomes.
- Calibrate on the same instrument, venue, session, and timeframe. Use closed candles and a held-out or walk-forward sample; record every variant tried.
- Include spread, fees, slippage, borrow or funding, partial fills, and latency. Reject the setup when net expectancy is not positive or depends on one narrow parameter.
- Return observed inputs, missing data, cost assumptions, entry, invalidation, exit, and a valid, watch, or no-trade status.
- Research basis: The SEC stop-order bulletin warns that a stop price is a trigger, not a guaranteed execution price, while stop-limit orders may not execute.
Key Rules
- Define invalidation, order type, trigger source, buffer, and quantity before entry.
- Never widen total authorized loss after entry without a separately approved risk decision.
- Do not assume round-number placement is inferior; test any clustering/buffer hypothesis.
- Model gap-through, halt, rejected order, stop-limit nonexecution, and slippage risk.
- Recalculate quantity and portfolio risk whenever the effective stop changes.
Related Skills
- trailing-stop -- manages exits after initial stop is set
- position-sizing -- stop distance is a direct input to position size calculation
1---2name: stop-loss-strategies3description: Place strategic stop losses using structure, ATR, or volatility methods. Use when protecting capital, defining trade invalidation, or managing downside risk.4license: Apache-2.05---67# Stop Loss Strategies89Proper stop placement protects capital while giving trades room to work.1011## Stop Loss Methods1213### 1. Structure-Based (Recommended)1415Place below swing low (long) or above swing high (short). Respects market structure with a clear invalidation point.1617### 2. ATR-Based1819Long example: `Stop = Entry - (ATR × Multiplier)`; mirror for shorts. Select the ATR estimator and multiplier in training data and freeze them.2021### 3. Support/Resistance Based2223Place beyond (not at) key S/R zones. Below support for longs, above resistance for shorts.2425### 4. Moving Average Based2627Place below key MA (20, 50, or 200). Dynamic stop level, good for trend following.2829### 5. Percentage-Based3031Fixed % below entry. Simple but ignores structure -- use only as a position sizing limit.3233Stop distance must follow the setup's invalidation and executable volatility/liquidity, not a universal percentage for a trade label. Recalculate quantity whenever the stop changes.3435## Buffer Rules3637Define the buffer in ticks, spread, and/or ATR and calibrate it by instrument, session, and order type. The purpose is to represent noise and execution uncertainty; do not infer a "stop hunt" from a stopped order.3839## Stop Management4041**Initial Stop**: Set at entry based on analysis. Based on the invalidation point for the trade thesis.4243**Breakeven Stop**: Treat moving to entry as one candidate management rule. It is not risk-free after fees, spread, gaps, and slippage; compare it with the unchanged initial stop out of sample.4445**Trailing Stop**: Locks in profits as the trade progresses (see trailing-stop skill).4647## Workflow48491. **Identify invalidation** -- the price level where the trade thesis is wrong502. **Choose method** -- structure-based for most setups, ATR-based for volatile assets513. **Add buffer** -- use the prevalidated tick/volatility and execution buffer524. **Choose order mechanics** -- stop-market prioritizes execution; stop-limit controls price but may not fill; confirm venue trigger source535. **Manage** -- follow the predeclared static, breakeven, time, or trailing rule5455## Evidence and Validation5657- Treat the setup as a testable hypothesis, not a prediction. Define thresholds, entry, invalidation, and exit before evaluating outcomes.58- Calibrate on the same instrument, venue, session, and timeframe. Use closed candles and a held-out or walk-forward sample; record every variant tried.59- Include spread, fees, slippage, borrow or funding, partial fills, and latency. Reject the setup when net expectancy is not positive or depends on one narrow parameter.60- Return observed inputs, missing data, cost assumptions, entry, invalidation, exit, and a valid, watch, or no-trade status.61- Research basis: The [SEC stop-order bulletin](https://www.investor.gov/introduction-investing/general-resources/news-alerts/alerts-bulletins/investor-bulletins-15) warns that a stop price is a trigger, not a guaranteed execution price, while stop-limit orders may not execute.6263## Key Rules6465- Define invalidation, order type, trigger source, buffer, and quantity before entry.66- Never widen total authorized loss after entry without a separately approved risk decision.67- Do not assume round-number placement is inferior; test any clustering/buffer hypothesis.68- Model gap-through, halt, rejected order, stop-limit nonexecution, and slippage risk.69- Recalculate quantity and portfolio risk whenever the effective stop changes.7071## Related Skills7273- **trailing-stop** -- manages exits after initial stop is set74- **position-sizing** -- stop distance is a direct input to position size calculation
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