Global view of the dynamics of the HD 10180 system for variations of the eccentricity and the semi-major axis of the six outermost planets. The color scale is the stability index obtained through a frequency analysis of the longitude of the planets over two consecutive time intervals. Red areas correspond to high orbital diffusion (instability) and the blue ones to low diffusion (stable orbits). Labeled lines give the value of χ² obtained for each choice of parameters.