Well that sucks.
What is your policy for keeping it listed? It was always just pay the fee to list, never discussed minimum trade volume or value.
Looking around there are a bunch of alt coins that dropped like a rock over the last few weeks. Or on the exchanges that are pegged to BTC are going between no orders or some buys at BTC0.00000001
-Dave
Keeping it listed for NDL should not be problem or concern as long as NDL trading is ongoing. ShorelineCrypto (SLC) currently does not impose minimum trade volume or whatever as long as there are always some traders buying and selling showing interest every month, which NDL surely had over months in the past. SLC started out as place to support Nengcoin (then later Cheetahcoin), now expanded to for other smaller genuine community altcoins too, it is doing well so far for its goal and purpose.
Those gets delisted at SLC always had issues, dev abandoned, no community support, no activity, etc, or tech break down on chains. NDL is at good place at SLC for now, probably not issue here. The price surely was dumped.