I am looking to use PEG orders on BATSONLY to obtain a specific functionality. Basically what I am attempting to do is place a BUY PEG-Midpoint order that will execute (add liquidity) at the midpoint of say 120.50 bid, 120.51 ask on SPY (which would be 120.505), or better. I know if I just put a PEG-Midpoint order it will follow the spread around until someone takes it out, I would like to limit the order somehow to guaranteeing to add liquidity at 120.505 or better. Basically preventing it from posting at 120.1 or higher. I'd imagine if it is possible, I would have to set the PEG offset or limit price of the peg order to something specific, but I am unfamiliar with this order type and the software documentation on using it isn't very good. I've also emailed BATS and my software provider, both told me I needed to direct the question to my broker, who was not sure when I asked. Thanks for any help.