A little advice for you SONM, try to get listed on Coinrail exchange, it's korean exchange site. Your price would be higher than now just what DENT did today (8x increase).
DENT had less exposure I think and that's why it went up and probably was pumped...
New exchanges (unless it's trex\polo\finex) won't affect SONM price, but some important releases will!
A few months ago SONM price touched 5000 satoshi or even if I'm not mistaken 8000 satoshi, but then the price of Bitcoin is not high as now, and big news will boost the price up.