# Plus Directional Indicator (PLUS_DI)

> QuantNexus indicator page for upside directional strength.

**Route**: `/quantnexus/indicators/plus-di/`

## What It Does

PLUS_DI measures the strength of upward directional movement over a rolling window.

## Formula

`+DI = smoothed positive directional movement / smoothed true range`

## Parameters

- `period` - default `14`
- `movav` - default `SmoothedMovingAverage`

## C++23 API

```cpp
#include <nonabt/indicators/plus_di.hpp>
auto plusDi = std::make_unique<nonabt::PLUS_DI>(data().close(), 14, "SmoothedMovingAverage");
```

## Common Usage

- Use it with `MINUS_DI` to identify directional bias.
- Confirm uptrend strength when `PLUS_DI` rises above `MINUS_DI`.
- Pair it with a trend filter instead of acting on it alone.