> For the complete documentation index, see [llms.txt](https://fto-2.gitbook.io/fto-indicators-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://fto-2.gitbook.io/fto-indicators-docs/access-to-bar-arrays/open.md).

# Open

Returns the opening price for a specific bar.

## Syntax

```typescript
Open(shift: number): number
```

## Parameters

* `shift`: A number representing the shift from the current bar

## Return Value

Returns a `number` representing the opening price of the specified bar.

## Description

The `Open` method returns the opening price of a bar at the specified shift from the current bar. The shift parameter determines which bar's opening price to return:

* 0: Current bar
* 1: Previous bar
* 2: Two bars ago
* And so on

## Example

```typescript
// Get current bar's opening price
const currentOpen = this.api.Open(0);

// Get previous bar's opening price
const previousOpen = this.api.Open(1);

// Compare current and previous opening prices
const openDiff = this.api.Open(0) - this.api.Open(1);
console.log(
  `Price opened ${openDiff > 0 ? "higher" : "lower"} than previous bar`
);

// Get opening prices for last 3 bars
for (let i = 0; i < 3; i++) {
  const openPrice = this.api.Open(i);
  console.log(`Bar -${i} open price: ${openPrice}`);
}
```