# Percent Rank (PCTRANK)

> QuantNexus indicator page for rolling percentile rank.

**Route**: `/quantnexus/indicators/pctrank/`

## What It Does

PCTRANK ranks the current value against the recent lookback window and returns its percentile position.

## Formula

`PctRank = percentile rank of current price in the last period bars`

## Parameters

- `period` - default `50`

## C++23 API

```cpp
#include <nonabt/indicators/pctrank.hpp>
auto pctRank = std::make_unique<nonabt::PCTRANK>(data().close(), 50);
```

## Common Usage

- Use it to measure where price sits inside its recent distribution.
- Helpful in mean reversion and extreme-value studies.
- Combine it with a trend filter to avoid fighting strong moves.