  This paper is devoted to study the circumstances favourable to detect Trojan
planets in close binary-star-systems by the help of eclipse timing variations
(ETVs). To determine the probability of the detection of such variations with
ground based telescopes and space telescopes (like former missions CoRoT and
Kepler and future space missions like Plato, Tess and Cheops), we investigated
the dynamics of binary star systems with a planet in tadpole motion. We did
numerical simulations by using the full three-body problem as dynamical model.
The stability and the ETVs are investigated by computing stability/ETV maps for
different masses of the secondary star and the Trojan planet. In addition we
changed the eccentricity of the possible Trojan planet. By the help of the
libration amplitude $\sigma$ we could show whether or not all stable objects
are moving in tadpole orbits. We can conclude that many amplitudes of ETVs are
large enough to detect Earth-like Trojan planets in binary star systems. As an
application, we prepared a list of possible candidates.
