# Cross Over (CROSSOVER)

> QuantNexus indicator page for crossover detection.

**Route**: `/quantnexus/indicators/crossover/`

## What It Does

CROSSOVER detects when one line moves above another. It is a primary building block for trend-following systems.

## Formula

`Cross Over = fast line crosses above slow line`

## Parameters

- `period` - default `252`
- `maperiod` - default `2`
- `_movav` - default `SMA`

## C++23 API

```cpp
#include <nonabt/indicators/crossover.hpp>
auto crossover = std::make_unique<nonabt::CROSSOVER>(data().close(), 252, 2, "SMA");
```

## Common Usage

- Use CROSSOVER for bullish trend triggers.
- Combine with confirmation rules.
- Useful for moving average cross systems.

## Practical Pattern

When the fast line crosses above the slow line, the system can interpret it as bullish confirmation.