diff --git a/Transaction-Rules.md b/Transaction-Rules.md
index f23a1f9..c34c5e3 100644
--- a/Transaction-Rules.md
+++ b/Transaction-Rules.md
@@ -165,8 +165,9 @@ The filter uses Django's ORM filter syntax (e.g., `account__id=5`, `description_
 The returned object has the following properties:
 
 *   `.sum`: The sum of the `amount` for the filtered transactions.
-*   `.balance`: The absolute balance (total income - total expenses).
+*   `.balance`: The absolute balance (total income - total expenses), always a positive number.
 *   `.raw_balance`: The raw balance (can be negative).
+*   `.exclude(filter)`: Exclude one or mode results (e.g. `description='Coffee'` will exclude any transaction with the description 'Coffee' from the original filter), 
 
 Example: `transactions(account_id=account_id, date__month=date.month).sum` returns the sum of all transactions in the same account and month as the triggering transaction.