Yes, but there is a problem…

timeframe(1 hour, updateonclose)
$candleDate[barindex]=date
$candleCloseTime[barindex]=time
$close[barindex]=close

//timeframe(1 hour, default)
//save the candlestick date, open and close time in variable arrays
//$candleDate[barindex]=date
//$candleOpenTime[barindex]=OpenTime
//$open[barindex]=open

timeframe(default)
//get the 10th back 1-hour candlestick info
iindex = max(0,lastset($candleDate)-0)
idate = $candleDate[iindex]
iopen = $candleOpenTime[iindex]
iclose = $candleCloseTime[iindex]
iopenb = $open[iindex]
icloseb = $close[iindex]

//Drawrectangle(DateToBarindex(idate*1000000+iopen),iopenb,DateToBarindex(idate*1000000+iclose),icloseb)

return iclose

If i want the accurate open time, it have to use default and not updateonclose. Otherwise i will get the new hour time at 21h45 (supposing default timeframe is 15 min) and not at 22h

For th close of the hour, i can get it only at 21h45 (not at 21h or 21h15 or 21h30) even with updateonclose

So i guess i need to do some math with hours to gt close time of the higher timeframe ? and also the barindex of the new or previous hour open ?

Thanks