xx% lower than the opening price trigger alert

I want to trigger a alert when the price is 33% lower than the Open price. this is daily open price and low price scrip

study(title=Open_and_Low, shorttitle=O_L, overlay=true)
st = input(true, title=OL)

//Daily
tdo = security(tickerid, 'D', open)
pdo = security(tickerid, 'D', open[1])
pl = security(tickerid, 'D', low)
pdl = security(tickerid, 'D', low[1])

//Daily Plots
offs_daily = 0
plot(st and tdo ? tdo : na, title=Daily Open, style=circles, linewidth=2, color=silver)
plot(st and pl ? pl : na, title=Daily Low, style=circles, linewidth=2, color=red)

Something like this

//@version=4
dailyOpen = security(syminfo.tickerid, 'D', open)
dailyClose = security(syminfo.tickerid, 'D', close)

GreenDailyCandle = dailyClose  > dailyOpen 
RedDailyCandle     = dailyClose  < dailyOpen 

condition = (GreenDailyCandle) ? (low <= 0.67 * dailyOpen) : (high >= 0.67 * dailyOpen )