The 52 weeks high or low is really just useful in trend identification. If a stock is at its 52 week high then its trend is positive. If a stock is near its 52 week low then its trend is negative. Momentum investors try to buy with the trend and the 52 week high is a convenient way to define its direction.
DISCLAIMER I am not Sebi registered analyst My studies are Educational purpose only Please consult with your financial advisor before trading or investing