2D periodogram of simulated RVs to show the peak detection limits of an injected planet at 25.2 d period in the presence of spot modulation at 9 d. The value of h/K derived for CI Tau is shown with the white dashed line at 1.1. The cyan line shows the detection limit in the optical where we expect the activity RV signals to be ~ four times larger. The light orange dashed line at 1.7 depicts the h/K expected in the H band.