Hey. I'm trying to find more information about methods to insure add liquidity on orders. Currently I use BATSALIQ, but I find for many equities, its harder to get a fill on BATS. Does anyone know if NYSE or NASD has add liquidity only options? Thanks Edit: I see a ARCAALO, hoping that ALO = Add Liquidity Only. Though I can't seem seem to find any explanation or documentation on it. Even searching for ARCAALO on nyse.com turns up nothing.