"Volume Multiplier for Alert" option added. by default it's 1.5. meaning that if the last X volumes is 1.5 times greater than volume moving average and if you set alert then you can get alert. you can set it as you wish. (X => "Number of Bars to Check to Alert)
This script must be run on realtime bars, not past bars. so if you want to test it you should test it on realtime bars.