# Non Zero Difference (NZD)

> QuantNexus indicator page for non-zero rolling difference analysis.

**Route**: `/quantnexus/indicators/nzd/`

## What It Does

NZD measures the difference between the current value and the most recent non-zero reference in the series.

## Formula

`NZD = current value - last non-zero reference`

## Parameters

- `period` - default `10`

## C++23 API

```cpp
#include <nonabt/indicators/nzd.hpp>
auto nzd = std::make_unique<nonabt::NZD>(data().close(), 10);
```

## Common Usage

- Use it as a preprocessing or analysis helper.
- Helpful when sparse or zero-heavy series need a non-zero comparison.
- Not intended as a primary standalone trading signal.