  We present MCDA, a modification of the CoRoT detrend algorithm (CDA) suitable
to detrend chromatic light curves. By means of robust statistics and better
handling of short term variability, the implementation decreases the systematic
light curve variations and improves the detection of exoplanets when compared
with the original algorithm. All CoRoT chromatic light curves (a total of
65,655) were analysed with our algorithm. Dozens of new transit candidates and
all previously known CoRoT exoplanets were rediscovered in those light curves
using a box-fitting algorithm. For three of the new cases spectroscopic
measurements of the candidates' host stars were retrieved from the ESO Science
Archive Facility and used to calculate stellar parameters and, in the best
cases, radial velocities. In addition to our improved detrend technique we
announce the discovery of a planet that orbits a
$0.79_{-0.09}^{+0.08}\,R_\odot$ star with a period of $6.71837\pm0.00001$ days
and has $0.57_{-0.05}^{+0.06}\,R_{\rm J}$ and $0.15\pm0.10\,M_{\rm J}$. We also
present the analysis of two cases in which parameters found suggest the
existence of possible planetary companions.
