Conversor .HST a .JSON

We are looking for an expert who can create a news EA (expert advisor) who can create a system where users can set their news preferences to low, medium or high. (have an on and off option, so one can choose whether you want to work with news or not) The EA should be able to get news from reliable sources and filter it according to the user's preferences. ( to deliver the source code of the created ea)