  In this work we explore a Holographic Dark Energy Model in a flat
Friedmann-Lema\^itre-Robertson-Walker Universe, which contains baryons,
radiation, cold dark matter and dark energy within the framework of General
Relativity. Furthermore, we consider three types of phenomenological
interactions in the dark sector. With the proposed model we obtained the
algebraic expressions for the cosmological parameters of our interest: the
deceleration and coincidence parameters. Likewise, we graphically compare the
proposed model with the $\Lambda$CDM model.
