There had been a lot of "systems" lately relying on symbols correlation
Might be interesting to actually see correlations with an indicator like this (based on math, not experience or assumption)
Pearson correlation (among other things) explained :
Correlation - Wikipedia, the free encyclopedia
PS: colors should be defined on the inputs tab, not the colors tab. Also, you can enter more than 8 symbols in the symbols list, but only first 8 will be taken into consideration, the rest is going to be ignored (the everlasting metatrader restriction of 8 "drawable" buffers)
PPS: updated indicator to manage mini and micro accounts correctly