How to get alert if you find variance is more than 20%?

Hi Everyone,

I have two accounts namely Sales Baseline and Sales Budget.

User will input the values for Sales Baseline in Input template.

And Sales Budget value calculates based on Sales baseline and Some adjustment drivers (Sales Market growth adjustment, Sales Market share adjustment...etc..) using Scripts.

So User wants alerts automatically (Message display) if they found 20% variance between two accounts.

Please let me know how can I achieve this requirement.

Thanks!!

-Viswanath