So whats the point of the mining, I'm wondering if there is something dark your computer is used for while doing the mining, because otherwise, what is the benefit of your machine running all day long.?
There was the time when poloniex was one of the top crypto exchanges with the high volumes but the time never remains the same, poloniex is now not in top 50's because of high fee and low volume, I would suggest you to use bittrex because it's interface is very user friendly.