Volume is incredibly low.  

I just encountered BlackCoin and I think it's a very interesting pump concept.  The coin switched from PoW to PoS.  Now the only way to mine it is indirectly, and to facilitate that, there is a multipool, bcmultipool.com, which mines scrypt alts, dumps for BTC, and buys BC with BTC.  It then pays out in BC.

The effect is that every 20-60 minutes there is a market order for BC.  The BC bid keeps going up.  Also, whatever scrypt is leading the return on difficulty gets dumped.   If enough miners decide to take payouts in BC in this way, BC would then drain the marketcap of all the scrypt coins.

I like this idea, because I think its good for BTC.  It's a layered market, and it reduces the fog of uncertainty regarding competitors by dumping and crushing the value of a large number of trash coins.  Not sure if it is actually an improvement over just switch-mining with BTC payout, though.  I might be.