Go to the Catalog => Search for and click on the desired SKU
Click the big blue "EDIT" button on the left sidebar that appears
In the Price & Availability section just add a minimum and maximum price
The Min Price and Max Price can also be adjusted on the Pricing Screen
Make sure the product is listed to Amazon.
The repricer only currently works for Amazon and keeps you under the competition without going below your minimum price.
The repricer works with an algorithm that wins the buy box a high percentage of time while keeping your price reasonable compared to the competition, it does not always win the buy box.
The repricer sets your main price for a product which will keep you competitive on other channels as well, if you want to override the price on another channel, just set a price override in that channel's Advanced Options when viewing the product on Zentail
Match the BuyBox
If you want to match the buybox to avoid a "race to the bottom":
Go to the Integrations page => Click the Amazon section
If you have your Min and Max prices set in Zentail, SKUs listed to Amazon will display a gray or green '$' icon in your Catalog table:
Gray means your repricer is configured but you do not have the buy box.
Green means you have the lowest landed price and therefore most likely have the buy box.
Enable Pricing Sync
If you were previously using a 3rd party repricing service or managing price in Amazon, you will need to make sure pricing sync is enabled on the "Feed Options" section of the Amazon section of your Integrations page. You must also have inventory for the sku for the repricer to work.