# system.kanoa.quality.spc.rule4(valueList)

Rule 4: Fourteen (or more) points in a row alternate in direction, increasing then decreasing (bimodal, 2 or more factors in data set)

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### Parameters
**valueList** `list[float]`: A list of values<br />

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### Returns
**ruleViolation** `Boolean`<br />
**resultSet** `List of Boolean values` ruleViolation for each value in the valueList<br />

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### Example
```python
valueList = [100, 105, 98, 106, 97, 107, 96, 108, 95, 109, 94, 110, 93, 111]
result = system.kanoa.quality.spc.rule4(valueList)
```