Trigger-Once Auto-Reset Alerts

I think the following might do it, but I'm not sure (and markets are closed right now)...

### EXAMPLE BREAKOUT DETECTOR

declare upper;

####  ALERT/ALARM SETTINGS

input alert = no;

input noise = {"Bell", "Chimes", default "Ding", "Ring", "NoSound"};

def box_top = 3338;

def box_bot = 3332;

# detect if regular trading hours

def RTH = If (SecondsFromTime(0930) >= 0 and SecondsTillTime(1600) >= 0, 1, 0);

# combinations that constitute an alert

def bull = high > box_top;

def bear = low < box_bot;

# hitting opening range resets one-shot alarm

def reset = low >= box_bot and high <= box_top;

# alert trigger conditions

def trigger = RTH and (bull or bear) and reset[1];

Alert(

    alert AND trigger,

    if bull then "BULL BREAKOUT" else "BEAR BREAKOUT",

    Alert.BAR, noise

);