# Up Day Bool (UPDAYBOOL)

> QuantNexus indicator page for a boolean up-day flag.

**Route**: `/quantnexus/indicators/updaybool/`

## What It Does

UPDAYBOOL returns a boolean-style signal that marks whether the current bar is an up day.

## Formula

`Up Day Bool = close > previous close`

## Parameters

- `period` - default `14`

## C++23 API

```cpp
#include <nonabt/indicators/updaybool.hpp>
auto upDayBool = std::make_unique<nonabt::UPDAYBOOL>(data().close(), 14);
```

## Common Usage

- Use it when you only need direction, not magnitude.
- Pair it with counting or aggregation logic.
- Helpful for filter conditions and event flags.