ShipStation has an auto-update feature which will periodically perform an order refresh on each store for which it is enabled. Auto-update refreshes stores based on an algorithm that accounts for order volume and frequency, so the frequency of the refresh will adjust over time as your order volume fluctuates.
Note: Currently, the auto-refresh cannot be set to run on a schedule or set interval. For this reason, we recommend you manually refresh your stores upon login using the Update All Stores button to ensure you are always working with your most recent orders.
Enable Store Auto-Import
Click Settings (the Wrench icon in the upper right).
Next, select Selling Channels and then Store Setup from the sidebar on the left.
Click Edit for whichever store(s) that you'd like to have update automatically.
Check the box next to Allow this store to 'auto-update' periodically?
Once you click Save Changes, the store will update on a regular basis. Set this option for each store you want to auto-refresh.
Again, before you process orders, we do recommend you manually update your stores/marketplaces to make sure you are working with your most recent order data.