Why is Shopify analytics not tracking my Facebook ad clicks?

[DAGNORAK]

Greetings all, I’m having some issues with shopify analytics,

currently I’m running Facebook ads and I’m getting around 30 clicks, but shopify pick up 0 of them visits. I know some people may click add and leave before it fully loads but not 100% of them? 
the link works and the ad works but for some reason shopify doesn’t seem to be seeing the visitors.

can anyone help? Thanks. Www.DAGNORAK.com