You can do use the same marker properties. This is just an example to plot the similar using the same program with using different markers
bestScores=rand(1,5)
bestPercent=bestScores*rand(1)
yyaxis left
plot(bestScores,'b-+','LineWidth',2);
yyaxis right
plot(bestPercent,'r-*','LineWidth',2);
One more thing I want to suggest you is that there is no need to define color properties ('color') in plot.
plot(bestScores,'b','LineWidth',2,'color','b');
Second (if you have't mentioned x axis values) or third (if mentioned x axis values) argument is by default taken as line color.
