Advertising companies similar to Propeller Ads for Forex niche

I'm looking for ad networks similar to those of Propeller that work very well with a Forex niche. I'm thinking about using Propeller Ads but the support was not very useful and I can consider using another person.

I was wondering if insertion notification ads for the Forex niche would work. I would like to try different types of ads in similar ad networks. I just want to know what types of ads have the best chance of converting my niche market.