Practically all orders of CDEL are FAKE meaning they are computer-generated.
Let me explain. Say I put an order to sell 2 million shares at the bid now at $0.011 and the order goes to CDEL. If CDEL sells at that price then CDEL will make no money. So CDEL computer will devise a strategy instantly in milliseconds to create a market where they can sell those 2 million shares say at $0.0112 or $0.0113 and give me my $0.011 and keep that little spread for themselves.
So all the orders you see by CDEL are fake in the sense which the computer creates to execute our buy/sell orders that we put while keeping a tiny profit.
If it will execute the orders at our buy/sell price then it won't make money.
Other MM's are also using computer algo but no ones come close to CDEL and CDEL is 100% computer-controlled. There is NO human making a decision for each trade. Human engineers are tweaking the algo 24/7. They have 3 shifts for algo engineers running 8 hrs shifts.
These are not my opinion but fact. I know it first-hand. NYMEX employed a $350 million TMS (trade management system) that took 5 1/2 yrs to develop/deploy. I was the head for that development/deployment the last 3 years from 1996-1999.