Sale only available products on Website
Customers cannot order more products than available in stock
The module allows to see a quantity of available products on Website and it doesn't enable customers to order more than this quantity.
Go to Website → Shop and, for example, add to cart some kind of products.
In the section "My Cart" that appears you can see the "Available" column is added. This column shows the total quantity of products available in stock.
Once quantity of products will be greater than available in stock, the corresponding value in "Quantity" column will turn red and the "Process checkout" button will become inactive.
The final check is made right after clicking "Confirm" button in the "Shipping & Billing" page. It redirects customer back to My Cart if available quantity had been changed, while he was typing his address.