---
alias: user-guide-spc-we4
description: "Defines a rule for eight consecutive points on a centerline, illustrated visually"
---

# Western Electric 4

## Rule definition

8 consecutive points on the same side of the centerline.

## Rule Scope

| Indicator Scope | Scope Type | Chart Type | Chart |
|-----------------|------------|------------|-------|
| Indicator1And2  | All        |            |       |

Table: Western Electric 4 configuration used for scope resolution

## Visual examples

### Indicator 1, point 1

![Western Electric 4 - Indicator 1 - Point 1][N2_WE4_indicator1_v1]

### Indicator 1, point 2

![Western Electric 4 - Indicator 1 - Point 2][N2_WE4_indicator1_v2]

### Indicator 2, Upper, point 1

![Western Electric 4 - Upper - Point 1][N2_WE4_indicator2_upper_v1]

### Indicator 2, Upper, point 2

![Western Electric 4 - Upper - Point 2][N2_WE4_indicator2_upper_v2]

### Indicator 2, Lower, point 1

![Western Electric 4 - Lower - Point 1][N2_WE4_indicator2_down_v1]

### Indicator 2, Lower, point 2

![Western Electric 4 - Lower - Point 2][N2_WE4_indicator2_down_v2]

[N2_WE4_indicator1_v1]: images/N2_WE4_indicator1_v1.png
[N2_WE4_indicator1_v2]: images/N2_WE4_indicator1_v2.png
[N2_WE4_indicator2_upper_v1]: images/N2_WE4_indicator2_upper_v1.png
[N2_WE4_indicator2_upper_v2]: images/N2_WE4_indicator2_upper_v2.png
[N2_WE4_indicator2_down_v1]: images/N2_WE4_indicator2_down_v1.png
[N2_WE4_indicator2_down_v2]: images/N2_WE4_indicator2_down_v2.png