Long Polling vs WebSockets vs Server-Sent Events (SSE)

Idea is to use Long Polling or WebSockets or Server-Sent Events (SSE), to Make Streaming data come in to update several charts in real time. This is better than waiting for all the series data to become completely available, which can take ages to happen, before plotting a chart. You may need to use websockets, long polling or Server-Sent Events (SSE). You will also need to work with websites and AWS server. NO partial release of milestone. Milestone only released in full when project is successfully delivered to client.