We will look into it, but I am not sure that it will work and/or will be useful.
The EV method indeed needs volume to work. If volume is too low, then the volume separation can stall.
Out of normal hours, the futures are not much traded and hence there will be little information to gain from the EV algo, I believe.
Anyway, we will have a look into the issue, but do not expect a response in the coming days as we have to first schedule the research work.
Pascal