There always seems to be a lump of sale quotes .3c or so above...

There always seems to be a lump of sale quotes .3c or so above the current SP, wherever it is. Can't be sure they are disappearing when the price gets to them (I have other things to do that watch all day) but a similar lump does seem to move up and down with the price. Methinks someone is keen to keep a cap on the SP and force sellers who are around to go under their cap. When the cap disappears for a short while the price moves up and swing traders jump in to buy. Is that when the capper sells the shares they've accumulated shares I wonder ...?