# Feed 'K' - Positions

**Requests**

{% tabs %}
{% tab title="Subscribe" %}

```json
{"event": "bind", "feed": "K", "feedId": "EUR"}
```

{% hint style="info" %}
Use `currency name`or `currency id` as `feedId` value to subscribe to positions in particular currency. If `feedId` field is absent, no filter is applied.
{% endhint %}
{% endtab %}

{% tab title="Unsubscribe" %}

```json
{"event": "unbind", "feed": "K"}
```

{% endtab %}
{% endtabs %}

**Feed handling**

{% tabs %}
{% tab title="Definitions" %}

```json
position = [
  0: currencyName (string)
  1: value (Efx::Size)
  2: counterpartyId (Efx::ClientId)
  3: maxReachablePosition (Efx::Size)
  4: minReachablePosition (Efx::Size)
]
```

{% endtab %}

{% tab title="Possible updates" %}

```
// snapshot
['K', feed_id, 'S', [position]]

// new position
['K', feed_id, '+', position]

// update position
['K', feed_id, 'M', position]

// del position
['K', feed_id, '-', position]

// failed to subscribe
['K', feed_id, 'Z', 2]

// unsubscribed
['K', feed_id, 'U', 0]
```

{% hint style="info" %}
`feed_id` is copied from subscription request and 0 if not provided
{% endhint %}
{% endtab %}
{% endtabs %}


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