Discount Rules
From Shopnix Help
What is Discount rules?
Where I will get this feature?
Go to store manager > MISC > DISCOUNT RULES
Inorder to add a New Discount Rule click on the 
In the Name you can give the discount rule’s Name,Discount Rate the value ,Tag List will include the products on which the discount rule(s) will be applicable,choose Stop After Rule and Is Active.
Note :
1.Discount rule will be applied for those products which have 0% discount in Go to store Manager > PRODUCTS > ALL PRODUCTS.
2. On activating Stop After Rule is not to stop discount rule for those which are after that rule, instead, it is to stop discount for the products which has same Type, Category etc, after that rule.
3.Stop After Rule :This means suppose you have 2 discount rules X:10% and Y:20% andStop After Rule:No then the discount on the product will be 10%+20%=30%,if you apply Stop After Rule is Yes then discount will be only 10%.
4.Is Active:This means whether the product is active or not.
For example Add 2 discount rule(X and Y) for Type - Clothing Apparel with 10% and 20% discounts and is_stop_after_rule inactive. The products which are in the Type - Clothing Apparel will now have 10+20=30% discount. If you active Stop After Rule for the one which has 10%, then the products in the Type - Clothing Apparel will have only 10% discount.