Stock charts help track price trends ... it could signal that a change in trend is coming or has occurred. For example, many investors move part of their portfolio to cash when the S&P 500 ...

The moving average (MA) is easy to calculate and when plotted on a chart, is a visual trend-spotting tool and technical indicator.

Stocks can find support at price levels that had been support before. The chart of Fair Isaac (FICO) illustrates this.

The maximum stock level is the largest amount of stock a business can store on site. In the bar graph example, it is 500 items of stock. The minimum stock level is also known as buffer stock.