I use my supply demand zones to decide where i place my stoploss on a trade, also i like whwn engulfing candles are leaving the zone.
This indicator can alert you when the zone is new ,broken,tested, retested, when a candle leaves the zone ( engulfing too)!
https://www.mql5.com/en/market/product/99737?source=Site+Market+MT4+Indicator+Rating006
