Is there any significance about opening range

The opening price establishes the first balance of the day between outsiders and insiders, amateurs and professionals. If you are a short-term trader, pay attention to the opening range—the high and the low of the first 15 to 30 minutes of trading. Most opening ranges are followed by breakouts, which are important because they show who is taking control of the market. Several intraday trading systems are based on following opening range breakouts.One of the best opportunities to enter a trade occurs when the market gaps at the open in the direction opposite your intended trade. 

Suppose you analyze a market at night and your system tells you to buy a stock. A piece of bad news hits the market overnight, sell orders come in, and that stock opens sharply lower. Once prices stabilize within the opening range, if you are still bullish and that range is above your planned stop-loss point, place your buy order a few ticks above the high of the opening range, with a stop below.