Example backend implementation

index_in_query.php

<?php

header('Access-Control-Allow-Origin : *');

echo '[
  {
    "target":"upper_75",
    "datapoints":[
      [622,1450754160000],
      [365,1450754220000]
    ]
  },
  {
    "target":"upper_90",
    "datapoints":[
      [861,1450754160000],
      [767,1450754220000]
    ]
  }
]';
?>

index_in_root.php

<?php
header('Access-Control-Allow-Origin: *');
?>

index_in_search.php

<?php
header('Access-Control-Allow-Origin : *');

echo '["upper_25","upper_50","upper_75","upper_90","upper_95"]';
?>