Untitled

//@version=5
indicator("IGRT", overlay = true)

show_to = input(true, title="Show Tokyo Reversal Time")
show_lo = input(true, title="Show London Reversal Time")
show_ny = input(true, title="Show New York Reversal Time")
nu1 = input(180, title="Multiplier")
nu2 = input(225, title="Subtraction")
nu3 = input(360, title="Modulo")

bac = (time-time[1])/2

tokyo = timestamp(year,month,dayofmonth,00,00)
london = timestamp(year,month,dayofmonth,07,00)
newyork = timestamp(year,month,dayofmonth,13,00)

too = open[ta.barssince(time==tokyo)]
loo = open[ta.barssince(time==london)]
nyo = open[ta.barssince(time==newyork)]

bgcolor(time==tokyo and show_to? color.new(color.red, 70) : na)
bgcolor(time==london and show_lo? color.new(color.blue, 70) : na)
bgcolor(time==newyork and show_ny? color.new(color.orange, 70) : na)

dgrto = ((math.sqrt(too)*nu1)-nu2)%nu3
durto = 86400000*((dgrto/60)/24)

dgrlo = ((math.sqrt(loo)*nu1)-nu2)%nu3
durlo = 86400000*((dgrlo/60)/24)

dgrny = ((math.sqrt(nyo)*nu1)-nu2)%nu3
durny = 86400000*((dgrny/60)/24)

bgcolor(((time+bac > tokyo+durto) and (time-bac < tokyo+durto)) and show_to? color.new(color.red, 30) : na)
bgcolor(((time+bac > london+durlo) and (time-bac < london+durlo)) and show_lo? color.new(color.blue, 30) : na)
bgcolor(((time+bac > newyork+durny) and (time-bac < newyork+durny)) and show_ny? color.new(color.orange, 30) : na)