Angularjs multiple $http.get request

What you need is $q.all.

Add $q to controller’s dependencies, then try:

$scope.product_list_1 = $http.get('FIRSTRESTURL', {cache: false});
$scope.product_list_2 = $http.get('SECONDRESTURL', {'cache': false});

$q.all([$scope.product_list_1, $scope.product_list_2]).then(function(values) {
    $scope.results = MyService.doCalculation(values[0], values[1]);
});