Second Entry Indicator for ToV?

Hi is anyone working on a Second Entry indicator/counter for ToV. Some scalpers look for 2nd entries to take. Trade Devils has one $250, and PATs, Price Action Trading Systems.com has one $50. I don’t know very much about how it would work but would like one on ToV so I could learn to spot them. Mack at PATs has posted hundreds of chart analysis videos and he almost exclusively takes 2nd entries.
See YouTube PATs Trading
thanks
Rod