The main rewards are SS Chest, with this you can get SS Comander Medals for upgrade Example Jon Snow  Daeron , you can get Weapon Fragments, which you can use to get Melisandre and Jeane - Russel Weapon, you can also get Battlediamonds, which you can use to upgrade your equipment to red, there is also Sapphire Essence, and you can get Anicent Dust, which you need for badges on red, furthermore there are Sp Medals and also badges for Motivation Limit.

Attacking Caravans

Attacking caravans can bring you rewards, but it is better to attack individual caravans, can bring better rewards, but what you get is random.

Escort the Caravan

At Escort the Caravan you can renew rewards and get better ones with a bit of luck.( In addition, you can now save a reward that will pay you 100%, but more on that in the next step )

Insurance

You can now insure a reward by clicking on the Insurance button, where you can select and insure a reward so that you will receive 100% of it.

Insurance 2

Once you have done this, you will see that there is now a padlock in front of your reward where you want it, as in the example image here

Information

For this event, I recommend doing it with an alt or a friend.
Both of you should design your carts with the desired bonus (lock the bonus you want) and then send it out with 100k T1 units and 1 commander. Your friend will attack your cart (make sure you are in different alliances, so one of you will need to leave the current alliance). This way, both of you can get the reward: the first player will get it from their cart, and the second player will have a chance to get it from plundering your cart.

About the Day of Trade Event:
In the Day of Trade event, you can upgrade the High-End Commander to Gold, level up your Badges to Red, and collect Ancient Dust through the event. Another option is to level up Red Weapons. Choose your goal wisely, and focus on achieving it with determination.