Even though the principle is the same for any type of investment instrument, buy cheap and sell at high prices, once you have a stock account, you need to determine when to buy and sell stocks. Furthermore, we also need to evaluate the level of liquidity and company profile, fluctuations in the Jakarta Composite Index, Return of Equity, market trends, sales, profit and earnings per share growth. After you evaluate the points above, you also need a strategy when buying stocks.