In the Monitors panel, you can enable additional quantities which should be computed and displayed in the chart view during the computation. These data should help you in assessment whether your model is being solved properly or if your solution is already converged. The monitor data will be printed into the output window during the simulation as well as plotted on charts in the graphics window.
Note: Number of variables allowed to be monitored depends on the selected solver. For certain solvers, the Monitors panel might not be available. In the case of simple, cold flow problems it would be pressure and velocity and for solvers with energy or temperature transport equation additionally you will be able to choose temperature field.