Timezone convertion between tickers

Question

I\'m attempting to color the background on ticker ES1! for those bars that fall within the trading session of ticker SPX.
We can use the time(resol

Answer 1

You can use security to calculate the time:

t1 = security("SPX", timeframe.period, time(timeframe.period, "0930-1600"))
bgcolor(t1 ? color.yellow : na)

UPDATE

As Bjorn Mistiaen noticed in comments, the gaps parameter must be set to barmerge.gaps_on:

t1 = security("SPX", timeframe.period, time(timeframe.period, "0930-1600"), gaps=barmerge.gaps_on)
bgcolor(t1 ? color.yellow : na)