Zoom into any leg of a trend and you'll find it has its own smaller highs and lows. A pullback inside an uptrend is, on its own, a small downtrend. Structure traders separate these layers into external structure (the big swings) and internal structure (the smaller swings inside each leg).
External structure
External structure is made of the major swing points that define the trend: the swing high that was broken, and the low that launched the break. Together they form the current dealing range. External structure tells you the overall bias.
Internal structure
Internal structure is everything that happens inside one external leg. During a pullback in an uptrend, the internal structure is typically bearish: lower highs and lower lows as price retraces. Internal swings are often labelled with a small "i", such as iLH or iBOS.
Why the distinction matters
- It stops you flipping bias on every pullback. An internal break against the trend is just the pullback developing. Only an external CHoCH changes the bigger picture.
- It times your entry. When the internal structure of a pullback turns back in the trend's direction (an internal CHoCH), the pullback may be ending. That's often the earliest sensible entry.
- It shows where stops belong. Stops go beyond external swing points, which are harder to reach, not beyond every internal wiggle.
| External structure | Internal structure | |
|---|---|---|
| Made of | Major swing highs and lows | Smaller swings inside one leg |
| Tells you | The overall trend and dealing range | What the current leg or pullback is doing |
| A break against it means | The trend may be reversing | The pullback may be ending |
| Use it for | Bias, targets, stop placement | Entry timing |
Key takeaways
- External structure is the major swings that define the trend and dealing range.
- Internal structure is the smaller swings inside each external leg, such as the lower highs within a pullback.
- An internal CHoCH in the trend's direction can signal that a pullback is ending.
- Only an external CHoCH changes the overall bias.