This Indicator basically helps us to get the candles where Open = Low & Open =High. Significance: 1) Open = Low Candles ----> Such candles are very powerful, as the Open = Low marks that there aren't any sellers left below the price on that day. Denoting BULLS power and aggression.
2) Open = High Candles ----> Open = High Candles signify that as soon as the markets opened, Bears were very strong, and no buyers left above the opening price for that candle. Denoting Strong BEARISH sentiment and aggression.
PS: This indicator can be used across all timeframes and indices. As it is purely based on Price-Action study.