Number of streams recovered with BEACON as a function of MCS. The blue rectangles are mean numbers taken from three simulations of the dissolving star cluster model consisting of 16 streams. The black triangles (up pointing) are for a Plummer sphere distribution with no rotation patterns (i.e., no streams); the green triangles (down pointing) are Leo I fake data, also with no streams. The red circles are the results of BEACON applied to the observational data set of the Leo I dSph. We use 2 as the value for the weight of the metallicity, with a sensitivity of 0.85 and a change in the minimum cluster size MCS. The inset shows qualitatively how a few real streams should appear in a ‘sea’ of false detections.