I have been trading for a while now. Each coin will have it rises and falls.  Some coins I see that often fluctuate frequently are ARDR, EMC2, NXT, POT, DGB, and BURST.  I trade on the Poloniex exchange, but I believe right now is a great time to buy into alt coins as they are all lower than average and the market has been quite volatile those last few months.  Although I believe Q4 will bring stabilization.