Tips for Advertisers -> Campaign Setup -> Dynamic Bidding:

“Being the highest bidder, will I always win?” Yes you will. Via Atomx’ second price auction, the winner pays, not his own bid, but the second highest bid plus one more cent. Being the highest bidder means: you settle $0.01 above the maximum bid of the second highest bidder. There is no algorithm in place in our OpenRTB exchange that gives runner-ups a chance to snatch an impression from the highest bidding campaign. Only frequency caps and other filter settings can cause the highest bidding campaign to miss out on available impressions. Campaign filters always affect the traffic volume in range.
Check out Atomx’ current average CPM values for top countries -> https://www.atomx.com/discover