This script's purpose is to provide a really quick view of gain/loss of a buying price.
As it is my first script, it is not perfect.
You have to select % scale and input your buying price in the options. I'll continue to work on it to : - make an auto selection of % scale (if possible) - render different colors (positive/negative differentiation in relation to the buying price)
Updates 11/10/2017 - default precision set to 8 (for satoshis)