# Double Exponential Moving Average Envelope (DEMAENVELOPE)

> QuantNexus indicator page for the DEMA envelope channel.

**Route**: `/quantnexus/indicators/demaenvelope/`

## What It Does

DEMA Envelope wraps a channel around the double exponential moving average to support breakout and pullback logic.

## Formula

`Envelope = DEMA +/- perc%`

## Parameters

- `period` - default `30`
- `_movav` - default `EMA`
- `perc` - default `2.5`

## C++23 API

```cpp
#include <nonabt/indicators/demaenvelope.hpp>
auto dema_env = std::make_unique<nonabt::DEMAENVELOPE>(data().close(), 30, "EMA", 2.5);
```

## Common Usage

- Use DEMA Envelope for dynamic breakout detection.
- Combine it with trend filtering.
- Helpful for fast-moving markets that still need a smooth reference line.

## Practical Pattern

Price breaking the envelope can signal acceleration; returning inside can signal normalization.