You can read about setting up applications for displaying in trades here. To display trades of a single application, select it from the list:

Jersey Monaco
x1
Supraball
Jersey Monaco
Type: Skin
Market price: ~0.04 USD
Jersey Vasco Away
x1
Supraball
Jersey Vasco Away
Type: Skin
Market price: ~0.04 USD
Mankini Black
x1
Supraball
Mankini Black
Type: Skin
Market price: ~0.03 USD
Green Cap
x1
Supraball
Green Cap
Type: Hat
Market price: ~0.03 USD
Chest
Supraball
x0
Chest
Type: Chest
Market price: ~0.04 USD
Chest
Supraball
x0
Chest
Type: Chest
Market price: ~0.04 USD
Chest
x1
Supraball
Chest
Type: Chest
Market price: ~0.04 USD
This chest contains 4 items. The items can be from the categories "common", "rare", "epic" or "legendary".
Jersey B/W 2
Supraball
x0
Jersey B/W 2
Type: Skin
Market price: ~0.03 USD