Not all graphs are available in all views. These graphs are not available in now view:
Gas
Gas is not available in the now view, because the gas meter does not have a realtime connection with the smartmeter. It only updates its readings periodically. For this reason it is not available in the now view.
Standby usage
Because standby usage is calculated over a longer period of time, it is not available in the now view.
Why is the graph still in my list if it is not available?
This is to make sure graphs don't switch orders and positions when you navigate through different time periods when you have multiple graphs.