It automatically highlights the candle color to yellow (default) where there is imbalance between buyers and sellers or in other words, a base or fight between buyers and sellers. When you identify this base candle, you can mark the demand and supply zones easily.
Pls note that the body of the candle need to be destroyed / covered.... It may happen in the next candle or after sometime.. Also, for better accuracy, you may shift between different timeframes....