# What does “approximate intrabar” mean?

> A tick-evaluated run that lacked finer data for some bars.

Source: https://algobarsx.com/docs/why-approximate/

A script with `evaluate: tick` needs the price path inside each bar. When a bar has no 1-minute data stored, its own open, high, low and close are used instead, the run is labelled *“approximate intrabar”*, and the affected bars are listed ([E2](https://algobarsx.com/docs/rules-timing/#E2)). Treat those stretches with more caution.