I have 51 variables containing 6,120 values of each variable. For example, resid1, resid2, ... resid51.
These are predicted values having different residuals after regressions.
What I want to do here is to find best similar residual trend over 50 residuals which will be the best matched with resid1.
If I make only 10 graphs using following code, it is too hard to find one which has the most similar trend with resid1 because they are overlaid too close.

Code:
line resid resid2 resid3 resid4 resid5 resid6 resid7 resid8 resid9 resid10 fips, legend(label(1 "1") label(2 "2") label(3 "3") label(4 "4") label(5 "5") label(6 "6") label(7 "7") label(8 "8") label(9 "9") label(10 "10"))
So if I draw 51 graphs, it will be harder to differentiate with each other to find the most similar one.
Is there other different ways to find this trend?

Thanks.