[Beetailer][Prestashop] Different prices in your original store and in your Facebook store

If you see a different price for your products in your Prestashop store and in your Facebook store probably it is because a default currency ratio problem.

Your default currency is the one your prices are inserted in your backoffice and it must have the ratio 1.

In order to change it you need to click on Payment -> Currencies, then check what is the current currency and set the ratio for this currency to 1 as you can see in the image below.