diff --git a/course-content/step4.md b/course-content/step4.md
index 977bd5c..af68780 100644
--- a/course-content/step4.md
+++ b/course-content/step4.md
@@ -126,6 +126,7 @@ SELECT
   ROUND(SUM(quantity)::NUMERIC, 2) AS total_quantity,
   ROUND(AVG(quantity)::NUMERIC, 2) AS average_quantity
 FROM trading.transactions
+WHERE ticker = 'BTC'
 GROUP BY txn_year, txn_type
 ORDER BY txn_year, txn_type;
 ```
@@ -161,7 +162,7 @@ SELECT
   SUM(CASE WHEN txn_type = 'BUY' THEN quantity ELSE 0 END) AS buy_quantity,
   SUM(CASE WHEN txn_type = 'SELL' THEN quantity ELSE 0 END) AS sell_quantity
 FROM trading.transactions
-WHERE txn_date BETWEEN '2020-01-01' AND '2020-12-31'
+WHERE txn_date BETWEEN '2020-01-01' AND '2020-12-31' AND ticker = 'ETH'
 GROUP BY calendar_month
 ORDER BY calendar_month;
 ```
@@ -502,4 +503,4 @@ ORDER BY sold_eth_quantity DESC;
 | c9f0f8    | 2020-11-01     |  15.931855129247867 |
 
 [![forthebadge](./../images/badges/go-to-previous-tutorial.svg)](https://github.com/datawithdanny/sql-masterclass/tree/main/course-content/step3.md)
-[![forthebadge](./../images/badges/go-to-next-tutorial.svg)](https://github.com/datawithdanny/sql-masterclass/tree/main/course-content/step5.md)
\ No newline at end of file
+[![forthebadge](./../images/badges/go-to-next-tutorial.svg)](https://github.com/datawithdanny/sql-masterclass/tree/main/course-content/step5.md)