Use a lnk.direct link
The best way to measure incoming traffic is to use either Cpanel or, even better, use a lnk.direct link for the order. By putting a ‘+s’ behind the link, you will see the exact amount of visitors received. Bit.ly is also a handy alternative.
We set each order up via a lnk.direct tracking link, as it is a reliable third party tracker with a good amount of extra information about the visitors.
These tools work better than Google Analytics and other analytics tools, which do not register all visitors under certain circumstances.