Winbox 4 seems to omit a useful feature that was present in version 3. In the interface section, in the Traffic tab you could click on the graph to pause it and get a numerical display of the traffic rate and timestamp at any given 1-second period. As in
This capability seems to be missing in Winbox 4. The presence of the y-axis scale helps a bit, but it’s still not possible to see the timestamp for a given sample.
But it looks better!