Write some Software

This is the project of presenting JS stock charts with the possibility to compare different assets, display news etc. For now I would like to find a solution to dynamically manage of json's, which goal is to define quotes to display. Whole action takes place in .html file and JS script there. I would like to achieve state where modification in source file (defined in json) is displayed immiediately on chart (or for example after changing instrument, which has to be displayed). Moreover I would like to load jsons from file. F.e. -> jsons defined in another file, JS load jsons from the list I will pass more details to interested freelancers. Code is attached, please suggest me some solutions and give your price.