Opening high/low

//@version=5
indicator('Opening high/low', overlay=true)

highTimeFrame = input.timeframe('D')
sessSpec = input.session('0930-1600')

is_newbar(res, sess) =>
    t = time(res, sess)
    na(t[1]) and not na(t) or t[1] < t

newbar = is_newbar('1440', sessSpec)

var float s1 = na
var float s2 = na
if newbar
    s1 := low
    s2 := high
    s2

plot(s1, style=plot.style_circles, linewidth=3, color=color.new(color.red, 0))
plot(s2, style=plot.style_circles, linewidth=3, color=color.new(color.lime, 0))