YES! Actually, there are hundreds of articles online on how to analyze your processing statements, books written on how the processing business works, and public information published by all card brands on interchange. You can utilize this information to help educate yourself on pricing, evaluate your existing pricing, and contact your ISO/agent or acquirer directly to discuss your pricing.
Here is a link to a great starter book: https://www.amazon.com/gp/product/0982611668
However, DIY negotiations have some major hurdles to achieving the best results which include;
- Understanding interchange and individual transaction classification
- Knowing the rate and fee structures, hidden fees like BIN, assessments, and transaction fees
- Contract terms, points of negotiation, and the likelihood of certain negotiable points
- Profitability of the ISO or ISV (helps to understand what credit card processors and software vendors are willing to accept)