How to get article wise visitor count?

Google Analytics can do that. It can track visitor statistics more accuratly than other services. More importantly, it is completely free. You can use your Gmail ID for using Google Analytics.

Google analytics has a stat option based on clicks and views per article too. It allows you to track incoming and outgoing traffic. It calculates the exit or bounce rate for the article as well. The analytics is more thorough with the data it offers for the stats. So I suggest you to switch from Statcounter to Google analytics. If you don't like Google analytics then switch to HiCounter. You'll find similar in-depth stats.