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Connected and Continuous Line Charts
For line graphs, the price used to draw the line may be the open, high, low, last, the median of high and low , or the median of high, low, and last. A continuous line graph is simply a line drawn between each of the price points for the selected price type. A connected line adds dots at each price point. Line graphs may be drawn with one of three line thicknesses and in a user specified color.
Line graphs of different price types for the same instrument may be drawn in a chart window, either in the same sub window or each in its own sub window.
When the charting period for the chart window is tick-by-tick, each instrument must be drawn in either connected or continuous line format. Additionally, the bid and ask prices at the time of each trade are available for charting if bid and ask prices are broadcast by the data feed. Thus, it is possible to form a chart object with 3 color codes lines graphs showing the bid price, ask price, and last trade of an instrument. This is accomplished by adding the same instrument three times to the chart window, each time selecting a different price type.