# Bollinger Bands Pct (BBANDSPCT)

> QuantNexus indicator page for BBANDSPCT percentage positioning.

**Route**: `/quantnexus/indicators/bbandspct/`

## What It Does

BBANDSPCT measures where price sits within the Bollinger Band structure. It is useful for relative band position and breakout context.

## Formula

`BBANDSPCT` expresses the position of price relative to the lower, middle, and upper band range.

## Parameters

- `period` - default `20`
- `devfactor` - default `2`
- `movav` - default `MovingAverageSimple`

## C++23 API

```cpp
#include <nonabt/indicators/bbandspct.hpp>
auto bbpct = std::make_unique<nonabt::BBANDSPCT>(data().close(), 20, 2, "MovingAverageSimple");
```

## Common Usage

- Use it to measure how stretched price is inside the band.
- Combine with breakout or fade logic.
- Useful for mean-reversion timing.

## Practical Pattern

Readings near the upper end of the range can indicate extension, while readings near the lower end can indicate compression or oversold conditions.