In the past day or so, Bitcoin Diamond's trading volume has increased hugely.

Currently now up to $920,774,000 USD. Which puts it 11th in the list of most traded cryptos.
Nearly all of it is on OKex and between BCD and BCH. (Note: OKex is a Hong Kong based exchange)
Although the price has slowly drifted downwards over the past few days, now at $24.3.

Can anyone explain?

$906,273,000 BCD/BCH
$3,516,290 BCD/BTC