To view the chart of a spread, you must first view the chart of the first contract.
Then enter the value of the spread.
Then view the second chart. The spread chart will come up. You will see it like this:
This is the spread AC + 1.0+78.48::BORL.
What this means is this. The first stock is AC. We subtract 1.0 times each value of BORL. The program requires positive value for all calculations, and so 78.48 was added to each value. There will be a value of 0.01 somewhere. In this example, it occurs on 1/2/1992.