If we have a graph that shows stock prices, but want to display things like RSI (an indicator) based on price movements (this is usually below the main graph) so I am going to create two graphs, one for price, and one for RSI. but if a user zooms in on the price in graph 1, how do i reload the RSI graph with data based on time frame zoomed in on graph 1?? is there a event that takes place that can return X values?