cdel is fun to play games with.
example:
bid=.0345
cdel has the low ask of 230k @ .037
i come in with 100k sell @ .0369 and have lowest ask
cdel automatically lowers to .0369 and covers me up.
i lower to .0368
cdel comes in again and lowers to .0368
i lower to 0.0367
cdel goes to 0.0366
i lower to 0.0365
cdel lowers to 0.0364
i cancel. ( i knew my stuff would not sell, just a quiet period in oil so i had some fun with cdel)