24 hour continous rescheduling

[Onepamopa]

Is it possible to set a device schedule to 24/7 and do continuous rescheduling?
At the moment It doesn't matter how I set it, the data after "Complete by:" gets grayed out (not considered by the algo).

The idea is to run 4 big water heaters (4 tons total) 24/7 when the electricity pricing is lower throughout the 24 hours.
Can DS also monitor the temperature reported and use that along with the mWh pricing?