these are all supertrend lines with different settings.
green lines indicate uptrend.
red line indicates down trend.
when all lines are green its very good uptrend - you can buy.
when all lines are red its very good downtrend - you can sell.
when few lines are red and few are green its not confirmed buy or sell.
in this situation you may confirm buy or sell with the help of other indicators.
its an easy to use indicator.