Without seeing your data, one quick suggestion is:
Using yyaxis option for two different data sets and use y-axis limit, e.g.:
t=0:1/500:2.5;
y = 5*sin(2*pi*t);
z = 5*tan(2*pi*t);
yyaxis left
plot(t,y, 'b')
ylabel('y(t)')
G=gca;
G.YColor = 'b';
yyaxis right
plot(t,z, 'r-.')
H=gca;
H.YColor='r';
ylabel('z(t)')
ylim([-500 500])
grid on
xlabel('time')
legend('5sin(t)', '5tan(t)')