Discount based on Net/Grand Total

I need to provide a discount on the Net Total / Grand total automatically.
For example if Grand Total is < 10 K , provide 5% discount. If Grand Total is > 10 K , provide 15% discount . For employees flat 20% discount.

Price rules deal with individual items. Is there anything similar to Tax Rule and Tax templates, such as DiscounTemplate/DiscountRule to auto fetch based on price, and employee type Discount rules.

Please let me know.

You could explore writing a custom script for this. Maybe that would work in your case.

Sure thanks will do. Just started to get my hands on custom script.