At the top of your bucket shelf, click the +cloud icon to create a new streaming bucket.
Name the new bucket (e.g. Trigger Test). You can optionally configure the bucket_key and access_key used by clicking on the "Configure Endpoint Keys" checkbox.
Click the "Create" button at the bottom and the new bucket should be listed at the top of your shelf.
Sending data to a streaming bucket requires that bucket's bucket_key and the private access_key associated with your account and that streaming bucket.
*Note: You can also create a new data bucket directly via the Events API. See the Events API documentation at https://initialstateeventsapi.docs.apiary.io/#reference/event-buckets/buckets-json.
*Another Note: SDKs such as the Python Streamer and the NodeJS Streamer contain methods that can easily create data buckets in a single line of code.