When viewing for example the altitude graph, the Y-axe has a range of +200 meters to -150 meters. When my altitude always stayed between +50 and +100m then the graph is almost totally flat while it could have 10 climbs of 50m included.
Request: try to dynamically adjust the default ranges to the minimum and maximum value that the activity has reached. For example if my lowest point was +50 and my highest point was +120m then the range of the Y-axe should be from +120 to +50