There is already SuperTrend indicator and thanks to its developer.
This script draws supertrend for current and higher time frame, it automatically calculates higher time frame and you don't need to adjust it when you change the period.
it also change the color of bars according to current and HTF supertrend, so you can see the trend by looking at bars color.
Bar color is lime if trend is up and red if trend is down. but if you see white bars then there is movement opposite the main trend.
if you like it please comment.