HD 67458 correlation strengths for the relationship between (ESPRESSO) CCF shape indicator (FWHM, contrast, equivalent width [EW], BIS, bisector curvature, bisector amplitude [A_b]) or (CHEOPS) flux and RV, as determined by a Spearman’s rank correlation test, for various Butterworth filter cutoff frequencies for each night (n1, n2, and n3) as indicated by marker style. CHEOPS data (last column) was interpolated onto the ESPRESSO timestamps prior to filtering; no simultaneous observations were performed during n1.