BollingerBands
forge.taclassSince Forge API 1
Signaturepython
forge.ta.BollingerBands(**inputs: Any) -> NoneA moving average with bands set by the standard deviation.
Inputs
| Name | Type | Default | Range |
|---|---|---|---|
| source | source | close | |
| period | int | 20 | 1 to 5000 |
| deviations | float | 2 | 0 to 10 |
middle = the simple average of the source over period
upper = middle + deviations * the population standard deviation of the same window, lower = middle - deviations * the same