Pine Script - How to get the high of current day, till current bar

Question

I would like to get the high value of the current day. And the high value should be taken from previous bars of the current day.

I tried this code

security(syminfo.ticker, "D", high, lookahead=barmerge.lookahead_on)

But the problem is that it is taking the high value of the current day after all the current day's candles.

Thank you.

Answer 1

newDay = change(time("D")) != 0

float todaysHigh = na

if newDay
    todaysHigh := high
else if high > todaysHigh[1]
    todaysHigh := high
else
    todaysHigh := todaysHigh[1]

if block can also be written as a ternary :

todaysHigh := newDay ? high : high > todaysHigh[1] ? high : todaysHigh[1]