# Ticks

Molecule supports intraday pricing. In other words, the system can store multiple prices of the same mark level, posted throughout the day. In Molecule terms, these are called **Ticks**. You don't have to use the Ticks model directly to benefit from its functionality.

#### How it works

Molecule's Marks API supports an attribute, **effective\_at**, that, when included in the payload of a POST request or a query parameter in a GET request, will trigger the use of the intraday pricing model. Let's look at some examples below.

#### Examples

Making POST requests to `/api/v2/marketdata/marks` (see [API Documentation](https://help.molecule.io/integrations-and-apis/integrations-guide/getting-started-with-molecule-api/api-documentation)) with the example payloads below would result in each of these marks getting saved separately, even though they are marks for the same product, as\_of, and contract.

```
## First POST
{
    'product': 'GBTC',
    'as_of': '2022-05-04',
    'contract': '2022-05-04',
    'value': 38783.38,
    'effective_at': '2022-05-04 15:00:00'
}

## Second POST
{
    'product': 'GBTC',
    'as_of': '2022-05-04',
    'contract': '2022-05-04',
    'value': 38759.38,
    'effective_at': '2022-05-04 15:15:00'
}

## Third POST
{
    'product': 'GBTC',
    'as_of': '2022-05-04',
    'contract': '2022-05-04',
    'value': 38772.128,
    'effective_at': '2022-05-04 15:30:00'
}

## Fourth POST
{
    'product': 'GBTC',
    'as_of': '2022-05-04',
    'contract': '2022-05-04',
    'value': 38899.78,
    'effective_at': '2022-05-04 15:45:00'
}
```

These intraday marks can be created by including the query parameter **effective\_at** in a GET request to the same URL.  For products flagged as **spot** products, the request will have special handling that will return the mark nearest to the **effective\_at** query parameter.