  We study the electroweak phase transition within a 5D warped model including
a scalar potential with an exponential behavior, and strong back-reaction over
the metric, in the infrared. By means of a novel treatment of the
superpotential formalism, we explore parameter regions that were previously
inaccessible. We find that for large enough values of the t'Hooft parameter
(e.g. $N\simeq 25$) the holographic phase transition occurs, and it can force
the Higgs to undergo a first order electroweak phase transition, suitable for
electroweak baryogenesis. The model exhibits gravitational waves and colliders
signatures. It typically predicts a stochastic gravitational wave background
observable both at the Laser Interferometer Space Antenna and at the Einstein
Telescope. Moreover the radion tends to be heavy enough such that it evades
current constraints, but may show up in future LHC runs.
