# Find Last Index (FINDLASTINDEX)

> QuantNexus indicator page for last-match index logic.

**Route**: `/quantnexus/indicators/findlastindex/`

## What It Does

FINDLASTINDEX returns the last index in a lookback window that satisfies a chosen condition.

## Formula

Return the latest bar index that matches the selected condition within the lookback period.

## Parameters

- `period` - default `14`
- `_evalfunc` - default `close_gt_open`

## C++23 API

```cpp
#include <nonabt/indicators/findlastindex.hpp>
auto lastIndex = std::make_unique<nonabt::FINDLASTINDEX>(data(), 14, "close_gt_open");
```

## Common Usage

- Use it to detect the last qualifying event in a window.
- Combine with recency-sensitive logic.
- Useful when the latest occurrence matters.