# G_AL_PriceDrop.

# The goal is to have an alert for a percentage drop in price from yesterday’s close that I can execute at night and have the alert work the next day.

# ALERT TRIGGER 1.
# Inputs.
input AlertPriceDrop = 0.02 ;   # 2% price drop from yesterday’s close.

# Test for today’s low being greater than 2% (AlertPriceDrop) lower than yesterday’s close.
# Define yesterday’s closing price and today's low price.
def ydayClose = close [1] ;
def tdayLow = low ;
# Define the condition to alert.
def PriceDrop = tdayLow < (1 - AlertPriceDrop) * ydayClose ;

# If I implement this alert trigger 1 tonight so that it will be ready to test tomorrow’s numbers, of course that isn’t what happens; I get an immediate alert based on this day’s low and yesterday’s close.  So, it appears that I need to add a time element so the alert only happens during the hours I pick.

# ALERT TRIGGER 2.
# Inputs.
input AlertStartTime = 940 ;     #  9:40 AM Eastern Time; I’m Pacific Time; Assuming TOS using Eastern.
input AlertStopTime = 1600 ;   #  4:00 PM.

# Test that the time of day is between the input hours selected.
# Current time (HHMM format??).
def currentTime = GetTime ( ) ;  # Assuming GetTime is in same format as the other times?
# Define start time and stop time conditions for the alert to work.
def AlertStart = currentTime >= AlertStartTime ;  #Couldn’t I skip currentTime and just use GetTime?
def AlertStop = currentTime <= AlertStopTime ;
# Define the alert period by combining the conditions.
def AlertPeriod = AlertStart AND AlertStop ;

# This trigger 2 doesn’t work. It still gives me an alert outside of the “AlertPeriod”.  Why?

# PLOT THE ALERT;
Plot ActivateAlert = PriceDrop AND AlertPeriod ;
Alert ( ActivateAlert, “Large Price Drop”, Alert.ONCE, Sound.BELL ) ;