Trendlines and S&R

Hi everyone.
i have few doubts regarding trendlines and S&R for intraday.

  1. On what timeframe should we draw trendline for intraday ? i draw S&R on 15 mins and use 5 mins for entry and exit.
    2.While using pivot points on kite, we see that R1 is dark red and R2 is light red. what does that mean ?