# Find First Index Highest (FINDFIRSTINDEXHIGHEST)

> QuantNexus indicator page for first-highest index lookup.

**Route**: `/quantnexus/indicators/findfirstindexhighest/`

## What It Does

FINDFIRSTINDEXHIGHEST returns the first bar index where the highest value occurs inside the lookback window.

## Formula

Return the earliest index that matches the maximum value condition in the window.

## Parameters

- `period` - default `14`
- `_evalfunc` - default `high`

## C++23 API

```cpp
#include <nonabt/indicators/findfirstindexhighest.hpp>
auto firstHighIndex = std::make_unique<nonabt::FINDFIRSTINDEXHIGHEST>(data(), 14);
```

## Common Usage

- Use it to locate the first peak in a lookback range.
- Combine with breakout and reversal logic.
- Helpful when the first top matters.