That really isn't the concern either, they are fine with you raising your prices. They might be a lot more concerned about prices going down. Theoretically, if your competitor charges X and you raise your prices from X-2 to X-1, someone else will step in and charge X-2 (as long as you and your primary competitor does not control the market). You raising your prices slightly isn't anti-competitive. On the other hand, If you and your primary competitor "collaborate" and decide to lower your prices to X-3 and X-4 (and keep them there), you might be able to gain a significant share of the market without cannibalizing each others customer base. That would be anti-competitive.