can anyone help me that why my activity is getting less day by day? it is start happening from two days ago.
hahaha, the only person who can help you with your activity is YOU!
Activity is based on the posts you make and the frequency (within two week periods) that you make those posts. You've been here less then a month. Why don't you make posts when you have something valuable to say and let the activity count sort itself out. I promise you that there is no error in the calculation.