Hey guys, is it possible to track transaction specific value conversion in facebook?. I set up facebook pixel on my site and purchase conversion on my thankyou page. When I come on facebook help center, they says I need to assign a value to conversion by modifying the facebook pixel ( here: fbq('track', 'Purchase', {value: '0.00', currency:'VND'}). But the value of my conversions (which are purchases) really depends on each customer. so how can i track value of different purchases in facebook. Thanks.