Easy to add a line to template.Finance?

[Alex K.]

Should it be possible to add a second "closing price" line to the Finance demo template by just modifying the template, or will this change require more functionality?

Since I'm new to envision, I wonder if I should expect to add a second line through small template changes only, or would significant alterations be necessary?

(I'm aiming for a comparison of sales volume and predicted sales volume)