When you say you are a "registered trader", do you mean that you are a market maker? Are you an in-house trader at a FINRA member firm? Or are you merely an individual with a series 7 license?
Depending upon the precise description of your position, you may be subject to NYSE Rule 15A, Order Protection Rule. The Rule is too lengthy to discuss here and you should fully familiarize yourself with it.
In pertinent part, Rule 15A(a)(1), (b)(2) states:
(1) An "Exchange trade-through", as that term is used in this Rule, occurs whenever a member on the Exchange initiates the purchase on the Exchange of a security traded through ITS ("an ITS Security") at a price which is higher than the price at which the security is being offered (or initiates the sale on the Exchange of such a security at a price which is lower than the price at which the security is being bid for) at the time of the purchase (or sale) in another ITS participating market center as reflected by the offer (bid) then being displayed on the Exchange from such other market center. The member described in the foregoing sentence is referred to in this Rule as the "member who initiated a trade-through".
(1) When purchasing or selling, either as principal or agent, any ITS Security on the Exchange or by issuing a commitment to trade through the System, members on the Exchange should avoid initiating a trade-through unless one or more of the provisions of paragraph (b)(3) below are applicable.
THE INFORMATION CONTAINED IN THIS POSTING IS FOR GENERAL INFORMATION PURPOSES ONLY AND DOES NOT CONSTITUTE LEGAL ADVICE. THE FURNISHING OF THIS INFORMATION DOES NOT CREATE AN ATTORNEY CLIENT RELATIONSHIP. AN ATTORNEY CLIENT RELATIONSHIP REQUIRES THE FURNISHING, REVIEW, AND SIGNING OF A RETAINER AGREEMENT.
I think NYSE Enforcement would take the position that the only person for whom you're providing liquidity is yourself, as your trading on the other side of the order was precipitated by the order. Your issue sounds more like an "interpositioning" issue than an insider trading/front-running issue. All of this of course is dependent on whether you're making a market.
The foregoing is not legal advice nor is it in any manner whatsoever meant to create or impute an attorney/client relationship.