Next Rate (Agile)

[baxgit]

I'm using Octopus Agile and want to display the next 30 minute rate - i.e. the rate associated with the next 30 minute rate period. The issue I have is that this is potentially different to what the 'next rate' sensor returns in situations where the rate for the next 30 minutes is the same as the current rate (in this situation the 'next rate' sensor, by design, returns the next rate that is different from the current rate, which could be a number of periods in the future).

Assuming I'm not the only person trying to do this, I'd be grateful for any suggestions as to how to retrieve the rate for the next 30 minute period. Thanks