Not sure what it's called so I couldn't bring up anything in a search. Happens with mainly low volume stocks. Bid and/or ask just starts appearing/disappearing. PACX etc. will be there then not be there, etc. After a few minutes of this, an order will fill and it will stop. Is this being done just to get an order filled? Annoying anyone watching? Or is something else going on? Also, what software is needed to place/cancel that quick? I know I can't do that with TD and Quotetracker. Is this prop firm software or Level III, etc? Thanks, V.