Huobi's volume is VERY low today (Sunday jan/19 UTC). Presumably the Chinese New Year holidays have started?
There was no such drop in previous Sundays, nor during the Christmas/Jan 1 holidays. (I suppose that Chinese employees generally don't have weekends off, do they?)
Curiously OKCoin's volume does not seem to be affected by this drop, or by Sundays in general. But it was very low from Fri Dec/20 to Tue Jan/02 UTC, inclusive.
Both exchanges show reduced activity in the same hour rage every day, from ~17:00 to ~22:00 UTC that corresponds to ~02:00 to ~07:00 am in Beijing, I believe. However Huobi's volume is VERY low in that interval, while OKCoin only drops by ~50%.
Are those drops due to exchange-specific events (e.g. problems with banks), or to different holidays and work hours by different user populations?
Or are they due to different volume-faking robots?