Heres a chart with more data. I wasn't going to post it so make of it what you will. I got caught up in a nice FTSE trade so it has gone to the bit bucket! I don't know the instrument but the volume struck me more high than ultra high but how long is a piece of string
Mind you the chart I post is the future rather than spot so maybe that accounts for some difference blue dot is WRB.
Cheers.