It uses an API link that Octopus provides to its customers. I am on the Agile tariff and, each day, I receive the following information (it is available on the website but also in a third-party App - Octopus Energy Watchdog).I'd like to cop out and say I don't know exactly how it does it ha!
I think it needs to be paired with the right tariff, such as the Octopus Agile tariff. Best place to look is either the Ohme website, Octopus' website for their Agile tariff or our own but it doesn't explain too much about the various tariffs that work with Ohme yet.
I know one of the Ohme directors uses this forum so I'll link him to this thread shortly and he might be able to help more.