How do you decide the order that OTAs display on Price Check?

There are two factors that determine which order OTAs appear on the Price Check widget. 

First is pricing. The OTAs will be ordered from the cheapest to the most expensive. 

Second is regional location. The OTAs will appear in the most relevant order for the region you are in. This means that the most relevant OTA for the region will sometimes appear at the bottom of the list if it is also offering the most expensive price.