What is Supply and Demand? Every day stock prices change due to the result of market forces in respect to supply and demand. When more people want to buy a stock (demand) than sell it (supply), then the price moves up (Refer to the green box in the diagram below). On the other hand, if more people wanted to sell a stock than buy it, there would be greater supply than demand, and the price would fall(Refer to the red box in the diagram below). And when you have supply and demand been acted out on bigger time frame, you will be presented the overall trend direction. Is it trending up, down or sideway? Below is the chart for STI since 1980 till now. Within the chart, there were a lot of supply and demand (waves) going on. From the chart, it is easy to say that it’s a trending ......