Top: original LC of the eclipsing binary CM Draconis (TIC 199574208) in sector 16. Bottom: LC of the same sector after removal of the eclipses as it was used for flare and rotation period search. Validated flares in both panels are marked in red. The rotation period found in the analysis is identical to the orbital period of 1.27 days, meaning the spin is synchronized to the orbital motion by tidal interaction between the two components. This tidal locking of CM Dra is also reported in the literature (e. g Deeg et al. 1998; Morales et al. 2009).