This is the simplest form of chart available to the technical analyst with time presented along the X-axis and price on the Y-axis. The actual time function that you plot will depend on your position in the market - a market maker will be interested in price fluctuations on a minute-by-minute basis, whilst the average investor will only be interested in a price on a daily or even weekly basis. Any price may be plotted on a line chart, but the most common is the closing, mid-price.
Example

Click here for the full size graph.
The largest benefit to the analyst of drawing line charts are their simplicity. They present an uncluttered picture of price movements and are very easy to understand.
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