How do I create this...

how can i create a line graph from localstorage? any idea?

Store values that represent the line on an array, store the Array.AsJSON in a localstorage value. When you re-load the data into the array, draw the line

Store values that represent the line on an array, store the Array.AsJSON in a localstorage value. When you re-load the data into the array, draw the line

You have sample capx there?

Array.AsJSON is a string of text in JSON format that described the data in an array. You can download a JSON of an array using the Array's action 'Download'. You can store the JSON by storing Array.AsJSON. You can load data into an array by using the Array's 'Load' action, in which you must specify a string of data in JSON format.

So to save data simply set a localstorage value to Array.AsJSON

And to load data, get the localstorage value, and pass it to Array>Load

No sample capx as no upload capability, sorry <img src="{SMILIES_PATH}/icon_e_sad.gif" alt=":(" title="Sad">

https://www.scirra.com/manual/108/array