Coinbase Average Price Calculator

gistfile1.js

// Go to the URL below and execute this JavaScript to calculate your coinbase average Bitcoin purchase price and the total purchased.
// https://coinbase.com/transfers
// Bookmarklet can be found here:  https://gist.github.com/sgreenfield/9258154

var $rows = $('#transfers_list tr:gt(0)'), orders = [], totalQuantity = 0, totalPrice = 0;

$rows.each(function(){
  var rate     = $.trim( $(this).find('td:eq(5)').text() ).split(' ')[0] * 1,
      quantity = $.trim( $(this).find('td:eq(3)').text() ).split(' ')[0] * 1;
  orders.push({ quantity: quantity, rate: rate });
});

$.each(orders, function(i, order){
  var price     = order.rate * order.quantity;
  totalQuantity += order.quantity;
  totalPrice    += price;
});

alert('paid average of: ' + (totalPrice / totalQuantity) + ' for ' + totalQuantity);