Where to paste my Facebook pixel event code in my webpage???? [Closed]

Registration date
Saturday February 25, 2017
Last seen
February 25, 2017

I have added Facebook pixel base code successfully in my webpage. I have some doubts while installing pixel event code. I copied below pixel code for "Addtobasket".

fbq('track', 'AddToCart', {
value: 3.50,
currency: 'USD'

I want to know where to add this script and want to know purpose of having this condition (value: 3.50, currency: USD)

I'm running a Indian shopping portal it's currency is INR. Can I remove the condition and simply add like below???

fbq('track', 'AddToCart');

If i use code like this whether it is possible to track how many peoples made "add to cart" in my page.

And tell me on which page I have to add this script??? either in home page or each and every webpage???

Thank You

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