I think, if i remember it correctly, the previous one already has this. Using the small arrows. For a long trade, when you have a small red arrow signal but instead, when price goes and breaks the HIGH of your previous candle, then it is a "back door" for long. Opposite for a short trade. When you see a small green arrow alert, instead price goes and breaks the LOW of previous candle, you then go short.
I believe, originally, these small arrow signals were meant to be for reverse trades. Hence, "back door". Yes, the new version includes lines where you can easily see entries and so on but you actually dont need it. Just wait for price to break the hi or the low of previous candle.