# Bar close or every tick

> One header line changes when the script runs.

Source: https://algobarsx.com/docs/tick-evaluation/

By default a script runs after each bar closes. With `evaluate: tick` it runs at every point of the price path, and market orders fill at the price that triggered them.

```algobarsx
strategy "Tick Scalper"
    market: XAUUSD
    bars: 1m
    evaluate: tick
    max_open: 1

input max_stretch = 2.0

when crosses_above(close, vwap()) once per bar cooldown 2 bars:
    buy risk: 0.5%, stop: 30 points, target: 1.5R, ghost: true

on tick:
    if not bar.confirmed and close < vwap() - atr(14) * max_stretch:
        close_all side: long
```

- Inside a forming bar, prices are live and indicators are not. `close`, `high` and `low` move with the tick, while indicator values stay as they were at the last bar close. Nothing repaints.
- `bar.confirmed` is false during a tick and true at the close.
- In a backtest, the 1-minute bars inside each bar supply the price path. When a bar has no finer data stored, its own path is used and the run is labelled *“approximate intrabar”*, listing the bars affected.

Rules: [E2](https://algobarsx.com/docs/rules-timing/#E2) and [E6](https://algobarsx.com/docs/rules-fills/#E6).