The best way to invest in stock is by its value. The price of stocks may fluctuate across time. Only by investing into a value will allow your chances to profit more in long run.
There is no need to look for its low or historical price. Also be prepared to lose some market values before you can learn to profit from it.
Buy stocks that shown values. Pack your golf or gym beg and get some quality times.
J&J Investment Co. 
Dear Poh, welcome to the world of Value Investing.