Hi Lukáš, if you want the Analytics beacon to be sent as soon as possible, I recommend using the Library Loaded event for the rule that sends the beacon. If the data that you need to attach to the beacon isn’t ready at that point, you’ll need to fire a rule when the data does become available, either by using a Custom Event or Direct Call event on the rule that sends the beacon. I’m not sure I answered your question fully, but I hope that helps.