On a candlestick chart are frequent candlesticks with one or both of a -
Low price which price moved no lower than before moving up to a candlestick High price enough pips away for a desirable long profit to have been possible.
High price which price moved no higher than before moving down to a candlestick Low price enough pips away for a desirable short profit to have been possible.
Knowing what should have been done to have gained the most pips profit is easy to recognize after the chart price movement has occurred.
Making any pips profit from using any chart is very difficult, without knowing and only being able to guess where the chart price will soon move to and when.
Knowing where the chart price will soon move to and when might be helpful, such as knowing in advance the Low price and High price of the current candlestick and next one candlestick.