Checking traffic on my models

Is there anyway to check what traffic do I have on my models? Some kind of chart showing me when exactly do I have a bigger interest in terms of visits would be very useful. I have slower and faster periods in sales and would like to know the reason for it. Sometimes I don't get any sales for a week and then for couple of days in a raw I can get few a day. My sales come and go in waves (it is not only about whether there is a discount or not) and I would like to analyze the reason for this.