Trading hours background highlight UTC based

//
// @author DarioSoltani
// https://www.tradingview.com/u/DarioSoltani/
//
// If you use this code in its original/modified form, do drop me a note. 
//
// This script highlights trading hours for different markets in the background

study(title="Trading hours background highlight UTC based", shorttitle="Trading hours", overlay=true)
timeinrange(res, sess) => time(res, sess) != 0

showUS = input(defval=true, type = bool, title="NY Session On")
tradeHoursUS = input(title="Trade hours US", type=session, defval="1330-2100")
sessionUS = lime

showEU = input(defval=true, type = bool, title="Euro Session On")
tradeHoursEU = input(title="Trade hours Europe", type=session, defval="0800-1630")
sessionEU = navy

bgcolor(showUS and timeinrange(period, tradeHoursUS) ? sessionUS : na, transp=95)
bgcolor(showEU and timeinrange(period, tradeHoursEU) ? sessionEU : na, transp=95)