---
title: "BarmergeLookahead"
---

# BarmergeLookahead

Lookahead mode for `request.*()` functions.

**Kind:** enum

**Variants**

| Name | Description |
| --- | --- |
| `On` | Use the latest value available at each bar (may introduce lookahead bias). |
| `Off` | Use only the value available at bar close time (no lookahead). |